#131F2B
Closest named color: Rich Black (#0D1B2A). oklch(23.4% 0.029 249.1), rgb(19, 31, 43).
Aa
White text reads best on this color (16.68:1).
About this color
#131F2B is a very dark close to neutral grey. In OKLCH its lightness is 23%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.018 away. White text reads best on it, at 16.68:1.
| Hue family | Neutrals |
| Lightness | very dark (23%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.25:1 |
| White text | 16.68:1 |
Values
| HEX | #131F2B |
| RGB | rgb(19, 31, 43) |
| HSL | hsl(210, 39%, 12%) |
| OKLCH | oklch(23.4% 0.029 249.1) |
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 #131F2B | 16.68:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #131F2B | 1.25:1 | Fails | Lc 0.0 | Not readable |
| #131F2B text on white | 16.68:1 | AAA | Lc 103.6 | Preferred for body text |
| #131F2B text on black | 1.25:1 | 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
#F3F6F8
oklch(97.1% 0.004 236.5)
-
Step 100
100
#E5EAF0
oklch(93.5% 0.01 252.8)
-
Step 200
200
#D0DAE5
oklch(88.4% 0.019 250.6)
-
Step 300
300
#B0C3D6
oklch(80.9% 0.034 248.2)
-
Step 400
400
#87A4C2
oklch(70.7% 0.055 249.5)
-
Step 500
500
#688DB2
oklch(63% 0.07 249)
-
Step 600
600
#4F779E
oklch(55.6% 0.076 248.7)
-
Step 700
700
#406487
oklch(49.1% 0.07 248.8)
-
Step 800
800
#35526E
oklch(42.8% 0.058 248.5)
-
Step 900
900
#2E4459
oklch(37.8% 0.046 248)
-
Step 950
950 (this color)
#131F2B
oklch(23.4% 0.029 249.1)
#131F2B 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) | #1A1F2C | 0.011 |
| Deuteranopia (no green cones) | #171D2B | 0.009 |
| Tritanopia (no blue cones) | #092223 | 0.025 |
| Achromatopsia (no color) | #1E1E1E | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #131F2B
#131F2B
oklch(23.4% 0.029 249.1)
- #271B0E
#271B0E
oklch(23.3% 0.03 67.8)
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 #131F2B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.018
- Dark #1B2431 ΔE 0.024
- Jet #212529 ΔE 0.034
- Oxford Blue #1B263B ΔE 0.038
- Rich Navy #001219 ΔE 0.067
- Space Cadet #2B2D42 ΔE 0.073
- Navy Blue #001146 ΔE 0.078
- Gunmetal #293241 ΔE 0.081
Use #131F2B 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.