#1F457D#1F457D

#1F457D is a dark, moderate blue. Relative luminance 0.060; OKLCH L 39.4% C 0.104 H 258.2°. Best body text is #FFFFFF at 9.52:1 contrast (WCAG AA passes).

Color values

HEX	#1F457D
RGB	rgb(31, 69, 125)
HSL	hsl(216, 60%, 31%)
HSV	hsv(216, 75%, 49%)
CMYK	cmyk(75.2%, 44.8%, 0%, 51%)
CIE-LAB	lab(29.48, 7.30, -35.70)
CIE-LCH	lch(29.48, 36.44, 281.56°)
OKLab	oklab(39.42% -0.0213 -0.1021)
OKLCH	oklch(39.42% 0.104 258.2)
XYZ	xyz(6.3935, 6.0275, 20.2245)
Luminance	0.0603 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F457D #7D571F

analogous

#1F747D #1F457D #281F7D

triadic

#1F457D #7D1F45 #457D1F

tetradic

#1F457D #7D1F74 #7D571F #1F7D28

square

#1F457D #7D1F74 #7D571F #1F7D28

split-complementary

#1F457D #7D281F #747D1F

monochromatic

#070F1B #132A4C #1F457D #2B60AE #457ED1

Accessibility & contrast

On white

9.52

#1F457D on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#1F457D on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F457D

9.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F457D	#FFFFFF	#000000	##FFFFFF
##1F457D	1.00	9.52	2.21	9.52
#FFFFFF	9.52	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A4A7F

Deuteranopia (green-blind)

#19417C

Tritanopia (blue-blind)

#00525B

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #1f457d;
/* rgb */ color: rgb(31, 69, 125);
/* oklch */ color: oklch(39.4% 0.104 258.2);

Tailwind

colors: {
  custom: {
    50: '#6878a3',
    500: '#1f457d',
    950: '#000000',
  },
}

SCSS

$custom: #1f457d;
$custom-light: #6878a3;
$custom-dark: #000000;

JSON

{
  "hex": "#1f457d",
  "rgb": {
    "r": 31,
    "g": 69,
    "b": 125
  },
  "hsl": {
    "h": 215.745,
    "s": 60.256,
    "l": 30.588
  },
  "oklch": {
    "l": 0.3942,
    "c": 0.1043,
    "h": 258.2
  },
  "luminance": 0.06028
}

Semantic roles & 50–950 ramp

primary

#1F457D

secondary

#B08648

accent

#A344E3

background

#F6F7FA

surface

#EBEDF4

border

#C6C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1F457D

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

Preview Lab → · Contrast checker → · Palette generator →