#031C3F
Closest named color: Navy Blue (#001146). oklch(23.1% 0.074 257.1), rgb(3, 28, 63).
Aa
White text reads best on this color (16.91:1).
About this color
#031C3F is a very dark, moderately saturated blue. In OKLCH its lightness is 23%, its chroma 0.074 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.036 away. White text reads best on it, at 16.91:1.
| Hue family | Blues |
| Lightness | very dark (23%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.24:1 |
| White text | 16.91:1 |
Values
| HEX | #031C3F |
| RGB | rgb(3, 28, 63) |
| HSL | hsl(215, 91%, 13%) |
| OKLCH | oklch(23.1% 0.074 257.1) |
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 #031C3F | 16.91:1 | AAA | Lc -106.0 | Preferred for body text |
| Black text on #031C3F | 1.24:1 | Fails | Lc 0.0 | Not readable |
| #031C3F text on white | 16.91:1 | AAA | Lc 103.5 | Preferred for body text |
| #031C3F text on black | 1.24:1 | 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
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C5DBFA
oklch(88.5% 0.049 256.9)
-
Step 300
300
#9DC3F9
oklch(80.9% 0.087 257.2)
-
Step 400
400
#65A2F7
oklch(70.8% 0.14 256.9)
-
Step 500
500
#3787F3
oklch(63% 0.18 257.1)
-
Step 600
600
#066EE2
oklch(55.6% 0.195 257.1)
-
Step 700
700
#005CC1
oklch(49.2% 0.175 257.1)
-
Step 800
800
#024B9F
oklch(42.7% 0.151 257.1)
-
Step 900
900
#10407E
oklch(37.8% 0.117 257)
-
Step 950
950 (this color)
#031C3F
oklch(23.1% 0.074 257.1)
#031C3F 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) | #072040 | 0.015 |
| Deuteranopia (no green cones) | #001A3E | 0.008 |
| Tritanopia (no blue cones) | #00252A | 0.057 |
| Achromatopsia (no color) | #1D1D1D | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031C3F
#031C3F
oklch(23.1% 0.074 257.1)
- #2A1A00
#2A1A00
oklch(23.3% 0.049 77.5)
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 #031C3F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.036
- Rich Black #0D1B2A ΔE 0.041
- Oxford Blue #1B263B ΔE 0.050
- Dark #1B2431 ΔE 0.053
- Night Blue #040348 ΔE 0.064
- Dark Indigo #1F0954 ΔE 0.068
- Jet #212529 ΔE 0.072
- Dark Navy #000435 ΔE 0.075
Use #031C3F 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.