#131D48
Closest named color: Oxford Blue (#1B263B). oklch(25% 0.081 269.8), rgb(19, 29, 72).
Aa
White text reads best on this color (16.19:1).
About this color
#131D48 is a dark, moderately saturated blue. In OKLCH its lightness is 25%, its chroma 0.081 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.044 away. White text reads best on it, at 16.19:1.
| Hue family | Blues |
| Lightness | dark (25%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.29:1 |
| White text | 16.19:1 |
Values
| HEX | #131D48 |
| RGB | rgb(19, 29, 72) |
| HSL | hsl(229, 58%, 18%) |
| OKLCH | oklch(25% 0.081 269.8) |
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 #131D48 | 16.19:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #131D48 | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #131D48 text on white | 16.19:1 | AAA | Lc 102.9 | Preferred for body text |
| #131D48 text on black | 1.29:1 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2EAFD
oklch(93.7% 0.027 267.5)
-
Step 200
200
#CBD8FE
oklch(88.5% 0.054 270.4)
-
Step 300
300
#A8BEFF
oklch(80.9% 0.096 269.8)
-
Step 400
400
#7C9AFF
oklch(70.8% 0.152 269.7)
-
Step 500
500
#5C7CFE
oklch(63.1% 0.196 269.6)
-
Step 600
600
#4660EE
oklch(55.5% 0.214 269.9)
-
Step 700
700
#384ECF
oklch(49% 0.199 269.8)
-
Step 800
800
#2E41A7
oklch(42.6% 0.165 269.8)
-
Step 900
900
#283984
oklch(37.7% 0.127 269.7)
-
Step 950
950 (this color)
#131D48
oklch(25% 0.081 269.8)
#131D48 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) | #02234A | 0.023 |
| Deuteranopia (no green cones) | #001E47 | 0.021 |
| Tritanopia (no blue cones) | #00272F | 0.067 |
| Achromatopsia (no color) | #212121 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #131D48
#131D48
oklch(25% 0.081 269.8)
- #2B2000
#2B2000
oklch(25% 0.051 90)
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 #131D48, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.044
- Navy Blue #001146 ΔE 0.047
- Dark Indigo #1F0954 ΔE 0.051
- Dark #1B2431 ΔE 0.055
- Rich Black #0D1B2A ΔE 0.059
- Marine #042E60 ΔE 0.063
- Space Cadet #2B2D42 ΔE 0.070
- Darkblue #030764 ΔE 0.071
Use #131D48 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.