#031740
Closest named color: Navy Blue (#001146). oklch(21.9% 0.083 261.3), rgb(3, 23, 64).
Aa
White text reads best on this color (17.49:1).
About this color
#031740 is a very dark, moderately saturated blue. In OKLCH its lightness is 22%, its chroma 0.083 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.021 away. White text reads best on it, at 17.49:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.20:1 |
| White text | 17.49:1 |
Values
| HEX | #031740 |
| RGB | rgb(3, 23, 64) |
| HSL | hsl(220, 91%, 13%) |
| OKLCH | oklch(21.9% 0.083 261.3) |
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 #031740 | 17.49:1 | AAA | Lc -106.3 | Preferred for body text |
| Black text on #031740 | 1.20:1 | Fails | Lc 0.0 | Not readable |
| #031740 text on white | 17.49:1 | AAA | Lc 104.0 | Preferred for body text |
| #031740 text on black | 1.20:1 | 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
#DFEBFE
oklch(93.7% 0.029 259.6)
-
Step 200
200
#C5DAFE
oklch(88.4% 0.055 261.2)
-
Step 300
300
#9EC1FF
oklch(80.8% 0.096 261.6)
-
Step 400
400
#699FFF
oklch(70.8% 0.152 261.1)
-
Step 500
500
#3F82FF
oklch(63.1% 0.198 261.5)
-
Step 600
600
#1B67F0
oklch(55.6% 0.219 261.3)
-
Step 700
700
#0D54D1
oklch(49% 0.204 261.4)
-
Step 800
800
#0F46A9
oklch(42.7% 0.169 261.3)
-
Step 900
900
#153C86
oklch(37.7% 0.132 261.6)
-
Step 950
950 (this color)
#031740
oklch(21.9% 0.083 261.3)
#031740 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) | #001C41 | 0.015 |
| Deuteranopia (no green cones) | #00173F | 0.005 |
| Tritanopia (no blue cones) | #002128 | 0.063 |
| Achromatopsia (no color) | #1A1A1A | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031740
#031740
oklch(21.9% 0.083 261.3)
- #251800
#251800
oklch(22% 0.045 81.8)
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 #031740, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.021
- Night Blue #040348 ΔE 0.048
- Rich Black #0D1B2A ΔE 0.048
- Dark Navy #000435 ΔE 0.061
- Dark Indigo #1F0954 ΔE 0.061
- Oxford Blue #1B263B ΔE 0.064
- Dark #1B2431 ΔE 0.067
- Darkblue #030764 ΔE 0.071
Use #031740 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.