#1B276E#1B276E

#1B276E is a dark, vivid blue. Relative luminance 0.028; OKLCH L 31.3% C 0.123 H 270.2°. Best body text is #FFFFFF at 13.44:1 contrast (WCAG AA passes).

Color values

HEX	#1B276E
RGB	rgb(27, 39, 110)
HSL	hsl(231, 61%, 27%)
HSV	hsv(231, 75%, 43%)
CMYK	cmyk(75.5%, 64.5%, 0%, 56.9%)
CIE-LAB	lab(19.26, 21.79, -42.68)
CIE-LCH	lch(19.26, 47.92, 297.04°)
OKLab	oklab(31.25% 0.0004 -0.1232)
OKLCH	oklch(31.25% 0.123 270.2)
XYZ	xyz(3.9910, 2.8094, 15.0808)
Luminance	0.0281 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B276E #6E621B

analogous

#1B516E #1B276E #391B6E

triadic

#1B276E #6E1B27 #276E1B

tetradic

#1B276E #6E1B51 #6E621B #1B6E39

square

#1B276E #6E1B51 #6E621B #1B6E39

split-complementary

#1B276E #6E391B #516E1B

monochromatic

#060919 #0F163D #1B276E #27389F #364CCE

Accessibility & contrast

On white

13.44

#1B276E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.56

#1B276E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B276E

13.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B276E	#FFFFFF	#000000	##FFFFFF
##1B276E	1.00	13.44	1.56	13.44
#FFFFFF	13.44	1.00	21.00	1.00
#000000	1.56	21.00	1.00	21.00
##FFFFFF	13.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003370

Deuteranopia (green-blind)

#002B6D

Tritanopia (blue-blind)

#003946

Achromatopsia (no color)

#2F2F2F

Design tokens & code

CSS

--color: #1b276e;
/* rgb */ color: rgb(27, 39, 110);
/* oklch */ color: oklch(31.3% 0.123 270.2);

Tailwind

colors: {
  custom: {
    50: '#656198',
    500: '#1b276e',
    950: '#000000',
  },
}

SCSS

$custom: #1b276e;
$custom-light: #656198;
$custom-dark: #000000;

JSON

{
  "hex": "#1b276e",
  "rgb": {
    "r": 27,
    "g": 39,
    "b": 110
  },
  "hsl": {
    "h": 231.325,
    "s": 60.584,
    "l": 26.863
  },
  "oklch": {
    "l": 0.31254,
    "c": 0.12322,
    "h": 270.2
  },
  "luminance": 0.0281
}

Semantic roles & 50–950 ramp

primary

#1B276E

secondary

#A39542

accent

#CD44E4

background

#F6F5F9

surface

#EBE9F2

border

#C6C5CC

text

#06050E

muted

#7A797E

Preview Lab

Preview with #1B276E

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

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