#1C4181#1C4181

#1C4181 is a dark, moderate blue. Relative luminance 0.056; OKLCH L 38.6% C 0.116 H 260.5°. Best body text is #FFFFFF at 9.89:1 contrast (WCAG AA passes).

Color values

HEX	#1C4181
RGB	rgb(28, 65, 129)
HSL	hsl(218, 64%, 31%)
HSV	hsv(218, 78%, 51%)
CMYK	cmyk(78.3%, 49.6%, 0%, 49.4%)
CIE-LAB	lab(28.41, 11.25, -39.92)
CIE-LCH	lch(28.41, 41.47, 285.74°)
OKLab	oklab(38.65% -0.0191 -0.1146)
OKLCH	oklch(38.65% 0.116 260.5)
XYZ	xyz(6.3302, 5.6117, 21.5142)
Luminance	0.0561 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1C4181 #815C1C

analogous

#1C7381 #1C4181 #2A1C81

triadic

#1C4181 #811C41 #41811C

tetradic

#1C4181 #811C73 #815C1C #1C812A

square

#1C4181 #811C73 #815C1C #1C812A

split-complementary

#1C4181 #812A1C #73811C

monochromatic

#060E1C #11284F #1C4181 #275AB3 #4278D6

Accessibility & contrast

On white

9.89

#1C4181 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.12

#1C4181 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1C4181

9.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1C4181	#FFFFFF	#000000	##FFFFFF
##1C4181	1.00	9.89	2.12	9.89
#FFFFFF	9.89	1.00	21.00	1.00
#000000	2.12	21.00	1.00	21.00
##FFFFFF	9.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1D4883

Deuteranopia (green-blind)

#003F80

Tritanopia (blue-blind)

#00505A

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #1c4181;
/* rgb */ color: rgb(28, 65, 129);
/* oklch */ color: oklch(38.6% 0.116 260.5);

Tailwind

colors: {
  custom: {
    50: '#6875a6',
    500: '#1c4181',
    950: '#000000',
  },
}

SCSS

$custom: #1c4181;
$custom-light: #6875a6;
$custom-dark: #000000;

JSON

{
  "hex": "#1c4181",
  "rgb": {
    "r": 28,
    "g": 65,
    "b": 129
  },
  "hsl": {
    "h": 218.02,
    "s": 64.331,
    "l": 30.784
  },
  "oklch": {
    "l": 0.38649,
    "c": 0.11622,
    "h": 260.5
  },
  "luminance": 0.05612
}

Semantic roles & 50–950 ramp

primary

#1C4181

secondary

#B48B44

accent

#AA40E7

background

#F6F7FA

surface

#EBEDF4

border

#C6C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1C4181

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →