#131F4F
Closest named color: Oxford Blue (#1B263B). oklch(26.1% 0.09 268.8), rgb(19, 31, 79).
Aa
White text reads best on this color (15.71:1).
About this color
#131F4F is a dark, moderately saturated blue. In OKLCH its lightness is 26%, its chroma 0.090 and its hue 269°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.048 away. White text reads best on it, at 15.71:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.33:1 |
| White text | 15.71:1 |
Values
| HEX | #131F4F |
| RGB | rgb(19, 31, 79) |
| HSL | hsl(228, 61%, 19%) |
| OKLCH | oklch(26.1% 0.09 268.8) |
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 #131F4F | 15.71:1 | AAA | Lc -105.1 | Preferred for body text |
| Black text on #131F4F | 1.33:1 | Fails | Lc 0.0 | Not readable |
| #131F4F text on white | 15.71:1 | AAA | Lc 102.4 | Preferred for body text |
| #131F4F 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
#F2F5FF
oklch(97.1% 0.014 272.7)
-
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
#7A9AFF
oklch(70.7% 0.152 269)
-
Step 500
500
#597CFF
oklch(63% 0.198 268.8)
-
Step 600
600
#3F5CFA
oklch(55.5% 0.236 268.9)
-
Step 700
700
#324ADA
oklch(49% 0.219 268.9)
-
Step 800
800
#293EB0
oklch(42.6% 0.182 268.9)
-
Step 900
900
#24378B
oklch(37.7% 0.141 268.8)
-
Step 950
950 (this color)
#131F4F
oklch(26.1% 0.09 268.8)
#131F4F 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) | #002651 | 0.024 |
| Deuteranopia (no green cones) | #00204E | 0.019 |
| Tritanopia (no blue cones) | #002B33 | 0.074 |
| Achromatopsia (no color) | #232323 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #131F4F
#131F4F
oklch(26.1% 0.09 268.8)
- #2F2300
#2F2300
oklch(26.3% 0.054 89.5)
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 #131F4F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.048
- Dark Indigo #1F0954 ΔE 0.050
- Marine #042E60 ΔE 0.051
- Navy Blue #001146 ΔE 0.054
- Midnight Blue #191970 ΔE 0.061
- Dark #1B2431 ΔE 0.063
- Darkblue #030764 ΔE 0.066
- Space Cadet #2B2D42 ΔE 0.068
Use #131F4F 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.