#1F538B#1F538B

#1F538B is a dark, moderate cyan. Relative luminance 0.083; OKLCH L 43.7% C 0.108 H 253.0°. Best body text is #FFFFFF at 7.87:1 contrast (WCAG AA passes).

Color values

HEX	#1F538B
RGB	rgb(31, 83, 139)
HSL	hsl(211, 64%, 33%)
HSV	hsv(211, 78%, 55%)
CMYK	cmyk(77.7%, 40.3%, 0%, 45.5%)
CIE-LAB	lab(34.68, 3.52, -36.04)
CIE-LCH	lch(34.68, 36.22, 275.57°)
OKLab	oklab(43.74% -0.0315 -0.1029)
OKLCH	oklch(43.74% 0.108 253)
XYZ	xyz(8.3168, 8.3409, 25.5927)
Luminance	0.0834 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F538B #8B571F

analogous

#1F898B #1F538B #211F8B

triadic

#1F538B #8B1F53 #538B1F

tetradic

#1F538B #8B1F89 #8B571F #1F8B21

square

#1F538B #8B1F89 #8B571F #1F8B21

split-complementary

#1F538B #8B211F #898B1F

monochromatic

#091727 #143559 #1F538B #2A71BD #4D90D7

Accessibility & contrast

On white

7.87

#1F538B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.67

#1F538B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F538B

7.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F538B	#FFFFFF	#000000	##FFFFFF
##1F538B	1.00	7.87	2.67	7.87
#FFFFFF	7.87	1.00	21.00	1.00
#000000	2.67	21.00	1.00	21.00
##FFFFFF	7.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#39578D

Deuteranopia (green-blind)

#274D8A

Tritanopia (blue-blind)

#006068

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1f538b;
/* rgb */ color: rgb(31, 83, 139);
/* oklch */ color: oklch(43.7% 0.108 253.0);

Tailwind

colors: {
  custom: {
    50: '#6b82ad',
    500: '#1f538b',
    950: '#000000',
  },
}

SCSS

$custom: #1f538b;
$custom-light: #6b82ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f538b",
  "rgb": {
    "r": 31,
    "g": 83,
    "b": 139
  },
  "hsl": {
    "h": 211.111,
    "s": 63.529,
    "l": 33.333
  },
  "oklch": {
    "l": 0.43743,
    "c": 0.10758,
    "h": 253
  },
  "luminance": 0.08342
}

Semantic roles & 50–950 ramp

primary

#1F538B

secondary

#BA854C

accent

#9741E7

background

#F6F7FA

surface

#ECEEF4

border

#C7C9CE

text

#080A10

muted

#7A7C7F

Preview Lab

Preview with #1F538B

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

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