#131D2D
Closest named color: Rich Black (#0D1B2A). oklch(23% 0.034 259.5), rgb(19, 29, 45).
Aa
White text reads best on this color (16.91:1).
About this color
#131D2D is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.034 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.013 away. White text reads best on it, at 16.91:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.034) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.24:1 |
| White text | 16.91:1 |
Values
| HEX | #131D2D |
| RGB | rgb(19, 29, 45) |
| HSL | hsl(217, 41%, 13%) |
| OKLCH | oklch(23% 0.034 259.5) |
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 #131D2D | 16.91:1 | AAA | Lc -106.2 | Preferred for body text |
| Black text on #131D2D | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #131D2D text on white | 16.91:1 | AAA | Lc 103.8 | Preferred for body text |
| #131D2D text on black | 1.24:1 | 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
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D0DAE9
oklch(88.5% 0.023 258.4)
-
Step 300
300
#B1C2DC
oklch(81% 0.041 258.8)
-
Step 400
400
#89A2CA
oklch(70.8% 0.065 259.7)
-
Step 500
500
#6B8ABC
oklch(63% 0.084 259.7)
-
Step 600
600
#5374A8
oklch(55.6% 0.09 259.2)
-
Step 700
700
#436190
oklch(49.1% 0.084 259.1)
-
Step 800
800
#384F75
oklch(42.7% 0.07 260.1)
-
Step 900
900
#30425F
oklch(37.7% 0.055 259.7)
-
Step 950
950 (this color)
#131D2D
oklch(23% 0.034 259.5)
#131D2D 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) | #171E2E | 0.008 |
| Deuteranopia (no green cones) | #141C2D | 0.004 |
| Tritanopia (no blue cones) | #082023 | 0.029 |
| Achromatopsia (no color) | #1D1D1D | 0.034 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #131D2D
#131D2D
oklch(23% 0.034 259.5)
- #251B09
#251B09
oklch(23% 0.034 80.5)
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 #131D2D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.013
- Dark #1B2431 ΔE 0.029
- Oxford Blue #1B263B ΔE 0.040
- Jet #212529 ΔE 0.041
- Rich Navy #001219 ΔE 0.064
- Navy Blue #001146 ΔE 0.070
- Space Cadet #2B2D42 ΔE 0.076
- Almost Black #070D0D ΔE 0.083
Use #131D2D 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.