#031F5E
Closest named color: Midnight Blue (#191970). oklch(26.9% 0.117 262.5), rgb(3, 31, 94).
Aa
White text reads best on this color (15.42:1).
About this color
#031F5E is a dark, moderately saturated blue. In OKLCH its lightness is 27%, its chroma 0.117 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Blue (#191970), ΔE 0.040 away. White text reads best on it, at 15.42:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.117) |
| Temperature | cool |
| Nearest name | Midnight Blue (#191970) |
| Black text | 1.36:1 |
| White text | 15.42:1 |
Values
| HEX | #031F5E |
| RGB | rgb(3, 31, 94) |
| HSL | hsl(222, 94%, 19%) |
| OKLCH | oklch(26.9% 0.117 262.5) |
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 #031F5E | 15.42:1 | AAA | Lc -104.6 | Preferred for body text |
| Black text on #031F5E | 1.36:1 | Fails | Lc 0.0 | Not readable |
| #031F5E text on white | 15.42:1 | AAA | Lc 101.8 | Preferred for body text |
| #031F5E text on black | 1.36:1 | 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
#DFEAFF
oklch(93.5% 0.031 263.5)
-
Step 200
200
#C6DAFF
oklch(88.5% 0.056 262.8)
-
Step 300
300
#9FC1FF
oklch(80.9% 0.096 262.2)
-
Step 400
400
#6C9EFF
oklch(70.7% 0.152 262.5)
-
Step 500
500
#4381FF
oklch(63% 0.199 262.5)
-
Step 600
600
#1461FF
oklch(55.6% 0.245 262.4)
-
Step 700
700
#004CE3
oklch(49.1% 0.236 262.5)
-
Step 800
800
#003EBC
oklch(42.7% 0.205 262.4)
-
Step 900
900
#00339F
oklch(37.7% 0.181 262.5)
-
Step 950
950 (this color)
#031F5E
oklch(26.9% 0.117 262.5)
#031F5E 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) | #002960 | 0.028 |
| Deuteranopia (no green cones) | #00205D | 0.004 |
| Tritanopia (no blue cones) | #00303B | 0.090 |
| Achromatopsia (no color) | #252525 | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #031F5E
#031F5E
oklch(26.9% 0.117 262.5)
- #332300
#332300
oklch(26.8% 0.055 83)
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 #031F5E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Blue #191970 ΔE 0.040
- Marine #042E60 ΔE 0.043
- Darkblue #030764 ΔE 0.047
- Dark Royal Blue #02066F ΔE 0.051
- Deep Blue #040273 ΔE 0.056
- Dark Indigo #1F0954 ΔE 0.058
- Navy Blue #001146 ΔE 0.061
- Navy #000080 ΔE 0.071
Use #031F5E 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.