#131F2D
Closest named color: Rich Black (#0D1B2A). oklch(23.5% 0.032 252.9), rgb(19, 31, 45).
Aa
White text reads best on this color (16.64:1).
About this color
#131F2D is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.032 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.018 away. White text reads best on it, at 16.64:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.032) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.26:1 |
| White text | 16.64:1 |
Values
| HEX | #131F2D |
| RGB | rgb(19, 31, 45) |
| HSL | hsl(212, 41%, 13%) |
| OKLCH | oklch(23.5% 0.032 252.9) |
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 #131F2D | 16.64:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #131F2D | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #131F2D text on white | 16.64:1 | AAA | Lc 103.5 | Preferred for body text |
| #131F2D text on black | 1.26:1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF1
oklch(93.5% 0.011 256.7)
-
Step 200
200
#D0DAE7
oklch(88.5% 0.021 254.9)
-
Step 300
300
#B0C3D9
oklch(81% 0.037 252.1)
-
Step 400
400
#86A3C6
oklch(70.6% 0.061 253.4)
-
Step 500
500
#678CB8
oklch(63% 0.079 253.3)
-
Step 600
600
#4E76A4
oklch(55.6% 0.085 252.7)
-
Step 700
700
#3F638C
oklch(49.1% 0.078 252.6)
-
Step 800
800
#345172
oklch(42.7% 0.065 252.5)
-
Step 900
900
#2E435C
oklch(37.7% 0.051 253.3)
-
Step 950
950 (this color)
#131F2D
oklch(23.5% 0.032 252.9)
#131F2D 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) | #1A202E | 0.012 |
| Deuteranopia (no green cones) | #161D2D | 0.008 |
| Tritanopia (no blue cones) | #082224 | 0.027 |
| Achromatopsia (no color) | #1E1E1E | 0.032 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #131F2D
#131F2D
oklch(23.5% 0.032 252.9)
- #271C0C
#271C0C
oklch(23.6% 0.032 75.5)
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 #131F2D, 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 0.023
- Jet #212529 ΔE 0.035
- Oxford Blue #1B263B ΔE 0.036
- Rich Navy #001219 ΔE 0.068
- Space Cadet #2B2D42 ΔE 0.072
- Navy Blue #001146 ΔE 0.075
- Gunmetal #293241 ΔE 0.080
Use #131F2D 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.