#131737
Closest named color: Rich Black (#0D1B2A). oklch(22.1% 0.062 274.8), rgb(19, 23, 55).
Aa
White text reads best on this color (17.42:1).
About this color
#131737 is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.062 and its hue 275°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.033 away. White text reads best on it, at 17.42:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.20:1 |
| White text | 17.42:1 |
Values
| HEX | #131737 |
| RGB | rgb(19, 23, 55) |
| HSL | hsl(233, 49%, 15%) |
| OKLCH | oklch(22.1% 0.062 274.8) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #131737 | 17.42:1 | AAA | Lc -106.5 | Preferred for body text |
| Black text on #131737 | 1.20:1 | Fails | Lc 0.0 | Not readable |
| #131737 text on white | 17.42:1 | AAA | Lc 104.2 | Preferred for body text |
| #131737 text on black | 1.20:1 | Fails | Lc 0.0 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 950.
-
Step 50
50
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F8
oklch(93.5% 0.021 274)
-
Step 200
200
#D1D8F5
oklch(88.6% 0.041 274.8)
-
Step 300
300
#B2BEF1
oklch(81% 0.073 274.3)
-
Step 400
400
#8B9AE9
oklch(70.6% 0.117 274.8)
-
Step 500
500
#707FE3
oklch(63.1% 0.15 274.8)
-
Step 600
600
#5A66D1
oklch(55.6% 0.163 275)
-
Step 700
700
#4A54B5
oklch(49.1% 0.152 274.9)
-
Step 800
800
#3D4592
oklch(42.6% 0.125 275.3)
-
Step 900
900
#333B75
oklch(37.7% 0.099 274.8)
-
Step 950
950 (this color)
#131737
oklch(22.1% 0.062 274.8)
#131737 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #071B38 | 0.019 |
| Deuteranopia (no green cones) | #031836 | 0.022 |
| Tritanopia (no blue cones) | #021E24 | 0.054 |
| Achromatopsia (no color) | #1A1A1A | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #131737
#131737
oklch(22.1% 0.062 274.8)
- #221A00
#221A00
oklch(22.1% 0.045 93.2)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #131737, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.033
- Navy Blue #001146 ΔE 0.045
- Dark #1B2431 ΔE 0.052
- Oxford Blue #1B263B ΔE 0.053
- Dark Indigo #1F0954 ΔE 0.065
- Night Blue #040348 ΔE 0.066
- Midnight Purple #280137 ΔE 0.067
- Jet #212529 ΔE 0.067
Use #131737 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.