#131A3B
Closest named color: Rich Black (#0D1B2A). oklch(23.2% 0.064 271.6), rgb(19, 26, 59).
Aa
White text reads best on this color (16.95:1).
About this color
#131A3B is a very dark, muted blue. In OKLCH its lightness is 23%, its chroma 0.064 and its hue 272°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.036 away. White text reads best on it, at 16.95:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | muted (0.064) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.23:1 |
| White text | 16.95:1 |
Values
| HEX | #131A3B |
| RGB | rgb(19, 26, 59) |
| HSL | hsl(230, 51%, 15%) |
| OKLCH | oklch(23.2% 0.064 271.6) |
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 #131A3B | 16.95:1 | AAA | Lc -106.1 | Preferred for body text |
| Black text on #131A3B | 1.23:1 | Fails | Lc 0.0 | Not readable |
| #131A3B text on white | 16.95:1 | AAA | Lc 103.7 | Preferred for body text |
| #131A3B text on black | 1.23:1 | 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4E9F9
oklch(93.5% 0.022 272.1)
-
Step 200
200
#CFD8F6
oklch(88.5% 0.042 272.3)
-
Step 300
300
#AFBEF2
oklch(80.8% 0.076 272.1)
-
Step 400
400
#869BEC
oklch(70.7% 0.121 271.9)
-
Step 500
500
#6980E6
oklch(63% 0.155 271.7)
-
Step 600
600
#5267D4
oklch(55.5% 0.168 271.7)
-
Step 700
700
#4355B8
oklch(49.1% 0.157 271.7)
-
Step 800
800
#374695
oklch(42.7% 0.13 271.7)
-
Step 900
900
#2F3C77
oklch(37.8% 0.101 271.4)
-
Step 950
950 (this color)
#131A3B
oklch(23.2% 0.064 271.6)
#131A3B 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) | #0A1E3C | 0.016 |
| Deuteranopia (no green cones) | #041B3A | 0.019 |
| Tritanopia (no blue cones) | #002127 | 0.056 |
| Achromatopsia (no color) | #1C1C1C | 0.064 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #131A3B
#131A3B
oklch(23.2% 0.064 271.6)
- #251C00
#251C00
oklch(23.1% 0.047 92)
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 #131A3B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.036
- Oxford Blue #1B263B ΔE 0.044
- Dark #1B2431 ΔE 0.046
- Navy Blue #001146 ΔE 0.046
- Dark Indigo #1F0954 ΔE 0.062
- Jet #212529 ΔE 0.063
- Night Blue #040348 ΔE 0.070
- Midnight Purple #280137 ΔE 0.073
Use #131A3B 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.