#1B488C#1B488C

#1B488C is a dark, vivid blue. Relative luminance 0.068; OKLCH L 41.1% C 0.123 H 258.8°. Best body text is #FFFFFF at 8.93:1 contrast (WCAG AA passes).

Color values

HEX	#1B488C
RGB	rgb(27, 72, 140)
HSL	hsl(216, 68%, 33%)
HSV	hsv(216, 81%, 55%)
CMYK	cmyk(80.7%, 48.6%, 0%, 45.1%)
CIE-LAB	lab(31.25, 10.79, -42.15)
CIE-LCH	lch(31.25, 43.51, 284.35°)
OKLab	oklab(41.07% -0.024 -0.1211)
OKLCH	oklch(41.07% 0.123 258.8)
XYZ	xyz(7.5013, 6.7603, 25.7154)
Luminance	0.0676 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B488C #8C5F1B

analogous

#1B818C #1B488C #261B8C

triadic

#1B488C #8C1B48 #488C1B

tetradic

#1B488C #8C1B81 #8C5F1B #1B8C26

square

#1B488C #8C1B81 #8C5F1B #1B8C26

split-complementary

#1B488C #8C261B #818C1B

monochromatic

#071325 #112E59 #1B488C #2562BF #4682DB

Accessibility & contrast

On white

8.93

#1B488C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.35

#1B488C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B488C

8.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B488C	#FFFFFF	#000000	##FFFFFF
##1B488C	1.00	8.93	2.35	8.93
#FFFFFF	8.93	1.00	21.00	1.00
#000000	2.35	21.00	1.00	21.00
##FFFFFF	8.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#224F8F

Deuteranopia (green-blind)

#00458B

Tritanopia (blue-blind)

#005863

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #1b488c;
/* rgb */ color: rgb(27, 72, 140);
/* oklch */ color: oklch(41.1% 0.123 258.8);

Tailwind

colors: {
  custom: {
    50: '#6a7aae',
    500: '#1b488c',
    950: '#000000',
  },
}

SCSS

$custom: #1b488c;
$custom-light: #6a7aae;
$custom-dark: #000000;

JSON

{
  "hex": "#1b488c",
  "rgb": {
    "r": 27,
    "g": 72,
    "b": 140
  },
  "hsl": {
    "h": 216.106,
    "s": 67.665,
    "l": 32.745
  },
  "oklch": {
    "l": 0.4107,
    "c": 0.12343,
    "h": 258.8
  },
  "luminance": 0.06761
}

Semantic roles & 50–950 ramp

primary

#1B488C

secondary

#BD8E46

accent

#A63DEB

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#080910

muted

#7A7B7F

Preview Lab

Preview with #1B488C

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

Preview Lab → · Contrast checker → · Palette generator →