#131D4A
Closest named color: Oxford Blue (#1B263B). oklch(25.2% 0.084 269.9), rgb(19, 29, 74).
Aa
White text reads best on this color (16.12:1).
About this color
#131D4A is a dark, moderately saturated blue. In OKLCH its lightness is 25%, its chroma 0.084 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.046 away. White text reads best on it, at 16.12:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | moderately saturated (0.084) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.30:1 |
| White text | 16.12:1 |
Values
| HEX | #131D4A |
| RGB | rgb(19, 29, 74) |
| HSL | hsl(229, 59%, 18%) |
| OKLCH | oklch(25.2% 0.084 269.9) |
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 #131D4A | 16.12:1 | AAA | Lc -105.4 | Preferred for body text |
| Black text on #131D4A | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #131D4A text on white | 16.12:1 | AAA | Lc 102.9 | Preferred for body text |
| #131D4A text on black | 1.30:1 | 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
Step 100
100
#E2E9FE
oklch(93.5% 0.029 271.1)
-
Step 200
200
#CAD8FF
oklch(88.4% 0.056 269.7)
-
Step 300
300
#A8BEFF
oklch(80.9% 0.096 269.8)
-
Step 400
400
#7C99FF
oklch(70.6% 0.153 270.2)
-
Step 500
500
#5D7CFF
oklch(63.2% 0.197 269.9)
-
Step 600
600
#455FF3
oklch(55.7% 0.222 269.9)
-
Step 700
700
#374CD3
oklch(49% 0.207 269.9)
-
Step 800
800
#2D40AB
oklch(42.7% 0.172 269.7)
-
Step 900
900
#273887
oklch(37.7% 0.133 269.7)
-
Step 950
950 (this color)
#131D4A
oklch(25.2% 0.084 269.9)
#131D4A 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) | #00234C | 0.023 |
| Deuteranopia (no green cones) | #001E49 | 0.021 |
| Tritanopia (no blue cones) | #002830 | 0.070 |
| Achromatopsia (no color) | #212121 | 0.085 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #131D4A
#131D4A
oklch(25.2% 0.084 269.9)
- #2C2100
#2C2100
oklch(25.4% 0.052 90.4)
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 #131D4A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.046
- Navy Blue #001146 ΔE 0.047
- Dark Indigo #1F0954 ΔE 0.049
- Dark #1B2431 ΔE 0.058
- Marine #042E60 ΔE 0.061
- Rich Black #0D1B2A ΔE 0.062
- Darkblue #030764 ΔE 0.068
- Midnight Blue #191970 ΔE 0.069
Use #131D4A 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.