#131F38
Closest named color: Oxford Blue (#1B263B). oklch(24.3% 0.051 263.6), rgb(19, 31, 56).
Aa
White text reads best on this color (16.39:1).
About this color
#131F38 is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.051 and its hue 264°. 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 16.39:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.28:1 |
| White text | 16.39:1 |
Values
| HEX | #131F38 |
| RGB | rgb(19, 31, 56) |
| HSL | hsl(221, 49%, 15%) |
| OKLCH | oklch(24.3% 0.051 263.6) |
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 #131F38 | 16.39:1 | AAA | Lc -105.8 | Preferred for body text |
| Black text on #131F38 | 1.28:1 | Fails | Lc 0.0 | Not readable |
| #131F38 text on white | 16.39:1 | AAA | Lc 103.3 | Preferred for body text |
| #131F38 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
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E4EAF6
oklch(93.6% 0.017 264.5)
-
Step 200
200
#CEDAF0
oklch(88.6% 0.033 262.7)
-
Step 300
300
#ADC1E9
oklch(80.9% 0.061 264.2)
-
Step 400
400
#81A0DD
oklch(70.6% 0.096 263.4)
-
Step 500
500
#6287D4
oklch(63% 0.124 263.8)
-
Step 600
600
#4970C1
oklch(55.6% 0.134 263.3)
-
Step 700
700
#3B5DA7
oklch(49.1% 0.125 263.8)
-
Step 800
800
#314C87
oklch(42.6% 0.103 264)
-
Step 900
900
#2B406C
oklch(37.7% 0.08 263.7)
-
Step 950
950 (this color)
#131F38
oklch(24.3% 0.051 263.6)
#131F38 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) | #152139 | 0.008 |
| Deuteranopia (no green cones) | #101E37 | 0.006 |
| Tritanopia (no blue cones) | #002528 | 0.047 |
| Achromatopsia (no color) | #1F1F1F | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #131F38
#131F38
oklch(24.3% 0.051 263.6)
- #2B1D00
#2B1D00
oklch(24.2% 0.05 83)
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 #131F38, 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 0.028
- Rich Black #0D1B2A ΔE 0.031
- Jet #212529 ΔE 0.046
- Navy Blue #001146 ΔE 0.061
- Space Cadet #2B2D42 ΔE 0.065
- Gunmetal #293241 ΔE 0.076
- Dark Indigo #1F0954 ΔE 0.077
Use #131F38 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.