#1B297D#1B297D

#1B297D is a dark, vivid blue. Relative luminance 0.033; OKLCH L 33.1% C 0.142 H 269.4°. Best body text is #FFFFFF at 12.65:1 contrast (WCAG AA passes).

Color values

HEX	#1B297D
RGB	rgb(27, 41, 125)
HSL	hsl(231, 64%, 30%)
HSV	hsv(231, 78%, 49%)
CMYK	cmyk(78.4%, 67.2%, 0%, 51%)
CIE-LAB	lab(21.20, 26.30, -49.12)
CIE-LCH	lch(21.20, 55.71, 298.17°)
OKLab	oklab(33.12% -0.0016 -0.1421)
OKLCH	oklch(33.12% 0.142 269.4)
XYZ	xyz(4.9453, 3.2990, 19.7742)
Luminance	0.0330 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1B297D #7D6F1B

analogous

#1B5A7D #1B297D #3E1B7D

triadic

#1B297D #7D1B29 #297D1B

tetradic

#1B297D #7D1B5A #7D6F1B #1B7D3E

square

#1B297D #7D1B5A #7D6F1B #1B7D3E

split-complementary

#1B297D #7D3E1B #5A7D1B

monochromatic

#050819 #10184B #1B297D #263AAF #3D53D5

Accessibility & contrast

On white

12.65

#1B297D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.66

#1B297D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1B297D

12.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1B297D	#FFFFFF	#000000	##FFFFFF
##1B297D	1.00	12.65	1.66	12.65
#FFFFFF	12.65	1.00	21.00	1.00
#000000	1.66	21.00	1.00	21.00
##FFFFFF	12.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#003880

Deuteranopia (green-blind)

#002E7B

Tritanopia (blue-blind)

#003F4F

Achromatopsia (no color)

#333333

Design tokens & code

CSS

--color: #1b297d;
/* rgb */ color: rgb(27, 41, 125);
/* oklch */ color: oklch(33.1% 0.142 269.4);

Tailwind

colors: {
  custom: {
    50: '#6862a3',
    500: '#1b297d',
    950: '#000000',
  },
}

SCSS

$custom: #1b297d;
$custom-light: #6862a3;
$custom-dark: #000000;

JSON

{
  "hex": "#1b297d",
  "rgb": {
    "r": 27,
    "g": 41,
    "b": 125
  },
  "hsl": {
    "h": 231.429,
    "s": 64.474,
    "l": 29.804
  },
  "oklch": {
    "l": 0.33115,
    "c": 0.14208,
    "h": 269.4
  },
  "luminance": 0.033
}

Semantic roles & 50–950 ramp

primary

#1B297D

secondary

#B1A143

accent

#D040E7

background

#F6F5FA

surface

#ECEAF4

border

#C7C6CE

text

#07050F

muted

#7A797F

Preview Lab

Preview with #1B297D

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

Preview Lab → · Contrast checker → · Palette generator →