#1F5BB0#1F5BB0

#1F5BB0 is a mid, vivid blue. Relative luminance 0.109; OKLCH L 48.2% C 0.149 H 258.1°. Best body text is #FFFFFF at 6.60:1 contrast (WCAG AA passes).

Color values

HEX	#1F5BB0
RGB	rgb(31, 91, 176)
HSL	hsl(215, 70%, 41%)
HSV	hsv(215, 82%, 69%)
CMYK	cmyk(82.4%, 48.3%, 0%, 31%)
CIE-LAB	lab(39.42, 12.91, -50.64)
CIE-LCH	lch(39.42, 52.26, 284.30°)
OKLab	oklab(48.17% -0.0307 -0.1456)
OKLCH	oklch(48.17% 0.149 258.1)
XYZ	xyz(12.1397, 10.9066, 42.5312)
Luminance	0.1091 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F5BB0 #B0741F

analogous

#1FA3B0 #1F5BB0 #2B1FB0

triadic

#1F5BB0 #B01F5B #5BB01F

tetradic

#1F5BB0 #B01FA3 #B0741F #1FB02B

square

#1F5BB0 #B01FA3 #B0741F #1FB02B

split-complementary

#1F5BB0 #B02B1F #A3B01F

monochromatic

#0D2548 #16407C #1F5BB0 #3177DB #659AE4

Accessibility & contrast

On white

6.60

#1F5BB0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.18

#1F5BB0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #1F5BB0

6.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F5BB0	#FFFFFF	#000000	##FFFFFF
##1F5BB0	1.00	6.60	3.18	6.60
#FFFFFF	6.60	1.00	21.00	1.00
#000000	3.18	21.00	1.00	21.00
##FFFFFF	6.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A64B3

Deuteranopia (green-blind)

#0057AE

Tritanopia (blue-blind)

#006F7D

Achromatopsia (no color)

#5D5D5D

Design tokens & code

CSS

--color: #1f5bb0;
/* rgb */ color: rgb(31, 91, 176);
/* oklch */ color: oklch(48.2% 0.149 258.1);

Tailwind

colors: {
  custom: {
    50: '#7388c8',
    500: '#1f5bb0',
    950: '#000000',
  },
}

SCSS

$custom: #1f5bb0;
$custom-light: #7388c8;
$custom-dark: #000000;

JSON

{
  "hex": "#1f5bb0",
  "rgb": {
    "r": 31,
    "g": 91,
    "b": 176
  },
  "hsl": {
    "h": 215.172,
    "s": 70.048,
    "l": 40.588
  },
  "oklch": {
    "l": 0.48172,
    "c": 0.14883,
    "h": 258.1
  },
  "luminance": 0.10908
}

Semantic roles & 50–950 ramp

primary

#1F5BB0

secondary

#C99E62

accent

#A33BED

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #1F5BB0

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

Preview Lab → · Contrast checker → · Palette generator →