#131D45
Closest named color: Oxford Blue (#1B263B). oklch(24.8% 0.076 269.5), rgb(19, 29, 69).
Aa
White text reads best on this color (16.28:1).
About this color
#131D45 is a very dark, moderately saturated blue. In OKLCH its lightness is 25%, its chroma 0.076 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.041 away. White text reads best on it, at 16.28:1.
| Hue family | Blues |
| Lightness | very dark (25%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.28:1 |
| White text | 16.28:1 |
Values
| HEX | #131D45 |
| RGB | rgb(19, 29, 69) |
| HSL | hsl(228, 57%, 17%) |
| OKLCH | oklch(24.8% 0.076 269.5) |
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 #131D45 | 16.28:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #131D45 | 1.28:1 | Fails | Lc 0.0 | Not readable |
| #131D45 text on white | 16.28:1 | AAA | Lc 103.1 | Preferred for body text |
| #131D45 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3EAFC
oklch(93.7% 0.025 268.8)
-
Step 200
200
#CCD8FB
oklch(88.4% 0.05 270.4)
-
Step 300
300
#A9BEFC
oklch(80.8% 0.091 269.8)
-
Step 400
400
#7D9AFA
oklch(70.6% 0.144 269.7)
-
Step 500
500
#5E7EF8
oklch(63.2% 0.185 269.4)
-
Step 600
600
#4763E7
oklch(55.6% 0.202 269.6)
-
Step 700
700
#3951C8
oklch(49% 0.186 269.5)
-
Step 800
800
#2F43A2
oklch(42.6% 0.155 269.6)
-
Step 900
900
#293A81
oklch(37.7% 0.121 269.6)
-
Step 950
950 (this color)
#131D45
oklch(24.8% 0.076 269.5)
#131D45 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) | #062246 | 0.019 |
| Deuteranopia (no green cones) | #001E44 | 0.021 |
| Tritanopia (no blue cones) | #00262D | 0.064 |
| Achromatopsia (no color) | #202020 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #131D45
#131D45
oklch(24.8% 0.076 269.5)
- #2B1F00
#2B1F00
oklch(24.7% 0.05 87.7)
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 #131D45, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.041
- Navy Blue #001146 ΔE 0.047
- Dark #1B2431 ΔE 0.050
- Rich Black #0D1B2A ΔE 0.053
- Dark Indigo #1F0954 ΔE 0.054
- Marine #042E60 ΔE 0.067
- Jet #212529 ΔE 0.069
- Space Cadet #2B2D42 ΔE 0.069
Use #131D45 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.