bluecoolCSS named color

Mediumblue #0000CD

Mediumblue is a medium, highly saturated cool-toned color with a cool cast. Defined as one of the 148 CSS named colors in the W3C CSS Color Module Level 4 specification.

Use cases: Trust UI · Corporate accents

Open in generator →Colors that go with mediumblue →

Families: Blues · Indigo Colors

Color values

FormatValue
HEX#0000CD
RGBrgb(0, 0, 205)
HSLhsl(240, 100%, 40%)
HSVhsv(240, 100%, 80%)
OKLCHoklch(38.35% 0.266 264.1)
OKLaboklab(38.35% -0.0275 -0.2643)
CMYKcmyk(100%, 100%, 0%, 19.6%)
XYZxyz(11.0156, 4.4063, 58.0156)
CIE-LABlab(25.0, 67.2, -91.5)
CIE-LCHlch(25.0, 113.5, 306.3°)
Luminance0.044 (WCAG relative)
/* Mediumblue */ --mediumblue: #0000cd; color: #0000cd; background-color: #0000cd;

Source: W3C CSS named color. CSS keyword: mediumblue.

Collections: Vibrant Colors · Jewel Tone Colors · Ocean Colors

Shade scale

Perceptual 50–950 scale, interpolated in CIE-LAB. Step 500 is the base color. Edit in the shade generator →

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950

OKLCH ramp (perceptually uniform, modern CSS)

50
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950

Shades (toward black)

#1305b6 #1b09a0 #1e0c8b #1f0e76 #1f0e62 #1d0e4e #1a0d3b #160a29 #0f0519 #000000

Tints (toward white)

#4525d3 #643fd9 #7d56de #936ee4 #a785e9 #ba9dee #ccb5f2 #decdf7 #efe6fb #ffffff

Tones (toward gray)

#240fbe #3218ae #3a1f9f #3f2590 #422a82 #432e73 #433265 #413557 #3f3849 #3b3b3b

Color harmonies

Complementary

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#0000CD
#CDCD00
#0000cd #cdcd00

Analogous

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#0066CD
#0000CD
#6600CD
#0066cd #0000cd #6600cd

Triadic

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#0000CD
#CD0000
#00CD00
#0000cd #cd0000 #00cd00

Tetradic

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#0000CD
#CD0066
#CDCD00
#00CD66
#0000cd #cd0066 #cdcd00 #00cd66

Square

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#0000CD
#CD0066
#CDCD00
#00CD66
#0000cd #cd0066 #cdcd00 #00cd66

Split Complementary

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#0000CD
#CD6600
#66CD00
#0000cd #cd6600 #66cd00

Monochromatic

Edit in generator →
#000053
#000090
#0000CD
#0B0BFF
#4848FF
#000053 #000090 #0000cd #0b0bff #4848ff

Accessibility & contrast

11.16
#0000CD on #FFFFFF
AA text ✓AA large ✓AAA text ✓UI 3:1 ✓
1.88
#0000CD on #000000
AA text ✗AA large ✗AAA text ✗UI 3:1 ✗

Best text on mediumblue

11.16
#FFFFFF text

WCAG 2.1: AA needs ≥4.5:1 for normal text, ≥3:1 for large text and UI components; AAA needs ≥7:1 / ≥4.5:1. Open the contrast checker →

Color blindness preview

Simulation using the Machado et al. (2009) physiological model, severity 1.0. This is an approximation of perception — not a medical assessment.

Normal vision
Protanopia (red-blind)
#0046D2
Deuteranopia (green-blind)
#002FCA
Tritanopia (blue-blind)
#005577

Closest named colors

Nearest matches by CIEDE2000 perceptual distance (ΔE₀₀) across the full color database.

ColorNameΔE₀₀
True Blue #010FCC1.11
Ultramarine Blue #1805DB2.26
Pure Blue #0203E22.79
Ultramarine #2000B13.38
Indigo Blue #3A18B14.14
Cobalt Blue #030AA74.73

Colors that go with mediumblue

Top matches by hue harmony, contrast and saturation compatibility. See all 10 ranked combinations →

Lavender #B39DDB
4.7:1
Analogous hue (Δh ≈21°) — neighbors on the color wheel
Magenta #FF00FF
3.6:1
Warm/cool bridge (Δh 60°) — adds depth without tension
Vibrant Green #0ADD08
6.0:1
Triadic harmony (Δh ≈121°) — balanced three-way contrast
Greige #B8AB98
5.0:1
Split-complementary angle (Δh ≈156°) — strong but softer than direct complement
Beige #F5F5DC
10.1:1
Complementary hue (Δh ≈180°) — maximum hue contrast

Values computed from the sRGB color model. CMYK is the naive sRGB conversion without an ICC profile. RGB percentages may differ between color-managed applications.