#1F30B4#1F30B4

#1F30B4 is a dark, highly saturated blue. Relative luminance 0.057; OKLCH L 40.2% C 0.205 H 268.2°. Best body text is #FFFFFF at 9.81:1 contrast (WCAG AA passes).

Color values

HEX	#1F30B4
RGB	rgb(31, 48, 180)
HSL	hsl(233, 71%, 41%)
HSV	hsv(233, 83%, 71%)
CMYK	cmyk(82.8%, 73.3%, 0%, 29.4%)
CIE-LAB	lab(28.64, 42.50, -70.62)
CIE-LCH	lch(28.64, 82.42, 301.04°)
OKLab	oklab(40.24% -0.0064 -0.2047)
OKLCH	oklch(40.24% 0.205 268.2)
XYZ	xyz(9.8574, 5.6993, 43.7517)
Luminance	0.0570 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.79

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F30B4 #B4A31F

analogous

#1F7BB4 #1F30B4 #591FB4

triadic

#1F30B4 #B41F30 #30B41F

tetradic

#1F30B4 #B41F7B #B4A31F #1FB459

square

#1F30B4 #B41F7B #B4A31F #1FB459

split-complementary

#1F30B4 #B4591F #7BB41F

monochromatic

#0D144C #162280 #1F30B4 #3447DC #6877E5

Accessibility & contrast

On white

9.81

#1F30B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#1F30B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F30B4

9.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F30B4	#FFFFFF	#000000	##FFFFFF
##1F30B4	1.00	9.81	2.14	9.81
#FFFFFF	9.81	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BB8

Deuteranopia (green-blind)

#003CB2

Tritanopia (blue-blind)

#00566F

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #1f30b4;
/* rgb */ color: rgb(31, 48, 180);
/* oklch */ color: oklch(40.2% 0.205 268.2);

Tailwind

colors: {
  custom: {
    50: '#7869cc',
    500: '#1f30b4',
    950: '#000000',
  },
}

SCSS

$custom: #1f30b4;
$custom-light: #7869cc;
$custom-dark: #000000;

JSON

{
  "hex": "#1f30b4",
  "rgb": {
    "r": 31,
    "g": 48,
    "b": 180
  },
  "hsl": {
    "h": 233.154,
    "s": 70.616,
    "l": 41.373
  },
  "oklch": {
    "l": 0.40235,
    "c": 0.20476,
    "h": 268.2
  },
  "luminance": 0.057
}

Semantic roles & 50–950 ramp

primary

#1F30B4

secondary

#CBBF64

accent

#D93AED

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0B0614

muted

#7C7A82

Preview Lab

Preview with #1F30B4

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

Preview Lab → · Contrast checker → · Palette generator →