#131F3A
Closest named color: Oxford Blue (#1B263B). oklch(24.4% 0.054 264.6), rgb(19, 31, 58).
Aa
White text reads best on this color (16.34:1).
About this color
#131F3A is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.054 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.028 away. White text reads best on it, at 16.34:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.054) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.28:1 |
| White text | 16.34:1 |
Values
| HEX | #131F3A |
| RGB | rgb(19, 31, 58) |
| HSL | hsl(222, 51%, 15%) |
| OKLCH | oklch(24.4% 0.054 264.6) |
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 #131F3A | 16.34:1 | AAA | Lc -105.7 | Preferred for body text |
| Black text on #131F3A | 1.28:1 | Fails | Lc 0.0 | Not readable |
| #131F3A text on white | 16.34:1 | AAA | Lc 103.2 | Preferred for body text |
| #131F3A text on black | 1.28:1 | 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
#F2F5FB
oklch(97% 0.009 264.5)
-
Step 100
100
#E4EAF7
oklch(93.6% 0.019 266)
-
Step 200
200
#CDD9F2
oklch(88.4% 0.037 265.1)
-
Step 300
300
#ACC1EB
oklch(80.9% 0.064 264.1)
-
Step 400
400
#819FE1
oklch(70.6% 0.103 265.1)
-
Step 500
500
#6186D9
oklch(63% 0.132 264.7)
-
Step 600
600
#486EC6
oklch(55.5% 0.143 264.6)
-
Step 700
700
#3A5CAB
oklch(49.1% 0.132 264.5)
-
Step 800
800
#304B8B
oklch(42.6% 0.111 264.9)
-
Step 900
900
#2A3F6F
oklch(37.6% 0.087 264.8)
-
Step 950
950 (this color)
#131F3A
oklch(24.4% 0.054 264.6)
#131F3A 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) | #13223B | 0.010 |
| Deuteranopia (no green cones) | #0E1E39 | 0.008 |
| Tritanopia (no blue cones) | #002529 | 0.049 |
| Achromatopsia (no color) | #202020 | 0.054 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #131F3A
#131F3A
oklch(24.4% 0.054 264.6)
- #2B1E00
#2B1E00
oklch(24.4% 0.05 85.4)
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 #131F3A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.028
- Dark #1B2431 ΔE 0.030
- Rich Black #0D1B2A ΔE 0.034
- Jet #212529 ΔE 0.049
- Navy Blue #001146 ΔE 0.058
- Space Cadet #2B2D42 ΔE 0.064
- Dark Indigo #1F0954 ΔE 0.074
- Gunmetal #293241 ΔE 0.076
Use #131F3A 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.