#1B285D#1B285D

#1B285D is a dark, moderate blue. Relative luminance 0.025; OKLCH L 29.9% C 0.096 H 269.4°. Best body text is #FFFFFF at 13.92:1 contrast (WCAG AA passes).

Color values

HEX	#1B285D
RGB	rgb(27, 40, 93)
HSL	hsl(228, 55%, 24%)
HSV	hsv(228, 71%, 36%)
CMYK	cmyk(71%, 57%, 0%, 63.5%)
CIE-LAB	lab(18.10, 14.23, -33.43)
CIE-LCH	lch(18.10, 36.33, 293.05°)
OKLab	oklab(29.93% -0.001 -0.096)
OKLCH	oklch(29.93% 0.096 269.4)
XYZ	xyz(3.1859, 2.5406, 10.6763)
Luminance	0.0254 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B285D #5D501B

analogous

#1B495D #1B285D #2F1B5D

triadic

#1B285D #5D1B28 #285D1B

tetradic

#1B285D #5D1B49 #5D501B #1B5D2F

square

#1B285D #5D1B49 #5D501B #1B5D2F

split-complementary

#1B285D #5D2F1B #495D1B

monochromatic

#070A18 #0D142E #1B285D #293C8C #3751BC

Accessibility & contrast

On white

13.92

#1B285D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.51

#1B285D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B285D

13.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B285D	#FFFFFF	#000000	##FFFFFF
##1B285D	1.00	13.92	1.51	13.92
#FFFFFF	13.92	1.00	21.00	1.00
#000000	1.51	21.00	1.00	21.00
##FFFFFF	13.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#052F5F

Deuteranopia (green-blind)

#00295C

Tritanopia (blue-blind)

#00353E

Achromatopsia (no color)

#2C2C2C

Design tokens & code

CSS

--color: #1b285d;
/* rgb */ color: rgb(27, 40, 93);
/* oklch */ color: oklch(29.9% 0.096 269.4);

Tailwind

colors: {
  custom: {
    50: '#60618b',
    500: '#1b285d',
    950: '#000000',
  },
}

SCSS

$custom: #1b285d;
$custom-light: #60618b;
$custom-dark: #000000;

JSON

{
  "hex": "#1b285d",
  "rgb": {
    "r": 27,
    "g": 40,
    "b": 93
  },
  "hsl": {
    "h": 228.182,
    "s": 55,
    "l": 23.529
  },
  "oklch": {
    "l": 0.2993,
    "c": 0.09603,
    "h": 269.4
  },
  "luminance": 0.02541
}

Semantic roles & 50–950 ramp

primary

#1B285D

secondary

#938341

accent

#C149DE

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05050C

muted

#79797D

Preview Lab

Preview with #1B285D

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

Preview Lab → · Contrast checker → · Palette generator →