#131F4E
Closest named color: Oxford Blue (#1B263B). oklch(26% 0.088 268.7), rgb(19, 31, 78).
Aa
White text reads best on this color (15.74:1).
About this color
#131F4E is a dark, moderately saturated blue. In OKLCH its lightness is 26%, its chroma 0.088 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.047 away. White text reads best on it, at 15.74:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | moderately saturated (0.088) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.33:1 |
| White text | 15.74:1 |
Values
| HEX | #131F4E |
| RGB | rgb(19, 31, 78) |
| HSL | hsl(228, 61%, 19%) |
| OKLCH | oklch(26% 0.088 268.7) |
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 #131F4E | 15.74:1 | AAA | Lc -105.1 | Preferred for body text |
| Black text on #131F4E | 1.33:1 | Fails | Lc 0.0 | Not readable |
| #131F4E text on white | 15.74:1 | AAA | Lc 102.5 | Preferred for body text |
| #131F4E text on black | 1.33:1 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFF
oklch(93.7% 0.03 267.2)
-
Step 200
200
#CAD8FF
oklch(88.4% 0.056 269.7)
-
Step 300
300
#A7BFFF
oklch(81% 0.095 268.4)
-
Step 400
400
#799AFF
oklch(70.6% 0.153 268.6)
-
Step 500
500
#597DFF
oklch(63.2% 0.197 268.6)
-
Step 600
600
#3F5DF8
oklch(55.5% 0.232 268.8)
-
Step 700
700
#324BD8
oklch(49% 0.216 268.7)
-
Step 800
800
#293FAE
oklch(42.6% 0.178 268.7)
-
Step 900
900
#24388A
oklch(37.8% 0.139 268.5)
-
Step 950
950 (this color)
#131F4E
oklch(26% 0.088 268.7)
#131F4E 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) | #002650 | 0.025 |
| Deuteranopia (no green cones) | #00204D | 0.019 |
| Tritanopia (no blue cones) | #002A33 | 0.070 |
| Achromatopsia (no color) | #232323 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #131F4E
#131F4E
oklch(26% 0.088 268.7)
- #2F2200
#2F2200
oklch(26% 0.053 87.4)
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 #131F4E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.047
- Dark Indigo #1F0954 ΔE 0.051
- Marine #042E60 ΔE 0.052
- Navy Blue #001146 ΔE 0.053
- Dark #1B2431 ΔE 0.061
- Midnight Blue #191970 ΔE 0.063
- Darkblue #030764 ΔE 0.067
- Space Cadet #2B2D42 ΔE 0.068
Use #131F4E 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.