#031237
Closest named color: Navy Blue (#001146). oklch(19.8% 0.076 262.6), rgb(3, 18, 55).
Aa
White text reads best on this color (18.33:1).
About this color
#031237 is a very dark, moderately saturated blue. In OKLCH its lightness is 20%, its chroma 0.076 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.029 away. White text reads best on it, at 18.33:1.
| Hue family | Blues |
| Lightness | very dark (20%) |
| Chroma | moderately saturated (0.076) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.14:1 |
| White text | 18.33:1 |
Values
| HEX | #031237 |
| RGB | rgb(3, 18, 55) |
| HSL | hsl(223, 90%, 11%) |
| OKLCH | oklch(19.8% 0.076 262.6) |
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 #031237 | 18.33:1 | AAA | Lc -106.9 | Preferred for body text |
| Black text on #031237 | 1.14:1 | Fails | Lc 0.0 | Not readable |
| #031237 text on white | 18.33:1 | AAA | Lc 104.7 | Preferred for body text |
| #031237 text on black | 1.14:1 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C8DAFB
oklch(88.5% 0.05 262.6)
-
Step 300
300
#A2C1FB
oklch(80.9% 0.089 262.7)
-
Step 400
400
#6F9EFA
oklch(70.6% 0.145 262.7)
-
Step 500
500
#4A83F7
oklch(63.1% 0.184 262.6)
-
Step 600
600
#2D69E6
oklch(55.6% 0.2 262.5)
-
Step 700
700
#2156C8
oklch(49% 0.186 262.8)
-
Step 800
800
#1D47A2
oklch(42.7% 0.155 262.9)
-
Step 900
900
#1C3D80
oklch(37.7% 0.12 262.5)
-
Step 950
950 (this color)
#031237
oklch(19.8% 0.076 262.6)
#031237 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) | #001738 | 0.015 |
| Deuteranopia (no green cones) | #001236 | 0.006 |
| Tritanopia (no blue cones) | #001B22 | 0.057 |
| Achromatopsia (no color) | #151515 | 0.076 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031237
#031237
oklch(19.8% 0.076 262.6)
- #1E1300
#1E1300
oklch(19.6% 0.04 82.5)
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 #031237, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.029
- Dark Navy #000435 ΔE 0.043
- Night Blue #040348 ΔE 0.045
- Rich Black #0D1B2A ΔE 0.046
- Very Dark Blue #000133 ΔE 0.054
- Dark Navy Blue #00022E ΔE 0.056
- Midnight #03012D ΔE 0.058
- Rich Navy #001219 ΔE 0.063
Use #031237 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.