#031540
Closest named color: Navy Blue (#001146). oklch(21.4% 0.086 262.5), rgb(3, 21, 64).
Aa
White text reads best on this color (17.71:1).
About this color
#031540 is a very dark, moderately saturated blue. In OKLCH its lightness is 21%, its chroma 0.086 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.017 away. White text reads best on it, at 17.71:1.
| Hue family | Blues |
| Lightness | very dark (21%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.18:1 |
| White text | 17.71:1 |
Values
| HEX | #031540 |
| RGB | rgb(3, 21, 64) |
| HSL | hsl(222, 91%, 13%) |
| OKLCH | oklch(21.4% 0.086 262.5) |
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 #031540 | 17.71:1 | AAA | Lc -106.5 | Preferred for body text |
| Black text on #031540 | 1.18:1 | Fails | Lc 0.0 | Not readable |
| #031540 text on white | 17.71:1 | AAA | Lc 104.2 | Preferred for body text |
| #031540 text on black | 1.18:1 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#DFEAFE
oklch(93.5% 0.03 262.5)
-
Step 200
200
#C6DAFF
oklch(88.5% 0.056 262.8)
-
Step 300
300
#A0C1FF
oklch(80.9% 0.095 262.7)
-
Step 400
400
#6C9EFF
oklch(70.7% 0.152 262.5)
-
Step 500
500
#4481FF
oklch(63% 0.198 262.7)
-
Step 600
600
#2065F5
oklch(55.7% 0.226 262.5)
-
Step 700
700
#1452D5
oklch(49.1% 0.21 262.6)
-
Step 800
800
#1344AC
oklch(42.6% 0.174 262.6)
-
Step 900
900
#163B88
oklch(37.6% 0.136 262.5)
-
Step 950
950 (this color)
#031540
oklch(21.4% 0.086 262.5)
#031540 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) | #001B41 | 0.018 |
| Deuteranopia (no green cones) | #00153F | 0.005 |
| Tritanopia (no blue cones) | #002028 | 0.065 |
| Achromatopsia (no color) | #181818 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031540
#031540
oklch(21.4% 0.086 262.5)
- #231700
#231700
oklch(21.4% 0.044 83.1)
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 #031540, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.017
- Night Blue #040348 ΔE 0.042
- Rich Black #0D1B2A ΔE 0.052
- Dark Navy #000435 ΔE 0.056
- Dark Indigo #1F0954 ΔE 0.060
- Very Dark Blue #000133 ΔE 0.067
- Darkblue #030764 ΔE 0.069
- Oxford Blue #1B263B ΔE 0.070
Use #031540 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.