#31487B
Closest named color: Light Navy (#155084). oklch(40.9% 0.091 264.4), rgb(49, 72, 123).
Aa
White text reads best on this color (8.96:1).
About this color
#31487B is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.091 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.032 away. White text reads best on it, at 8.96:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.091) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.34:1 |
| White text | 8.96:1 |
Values
| HEX | #31487B |
| RGB | rgb(49, 72, 123) |
| HSL | hsl(221, 43%, 34%) |
| OKLCH | oklch(40.9% 0.091 264.4) |
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 #31487B | 8.96:1 | AAA | Lc -94.8 | Preferred for body text |
| Black text on #31487B | 2.34:1 | Fails | Lc 13.6 | Not readable |
| #31487B text on white | 8.96:1 | AAA | Lc 90.4 | Preferred for body text |
| #31487B text on black | 2.34:1 | Fails | Lc -11.9 | 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 800.
-
Step 50
50
#F3F5FA
oklch(97% 0.007 268.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#CFD9ED
oklch(88.4% 0.03 264.4)
-
Step 300
300
#B0C1E4
oklch(81% 0.053 264.7)
-
Step 400
400
#86A0D6
oklch(70.6% 0.085 264.4)
-
Step 500
500
#6888CB
oklch(63.1% 0.108 264.1)
-
Step 600
600
#5071B8
oklch(55.7% 0.117 264.1)
-
Step 700
700
#415E9E
oklch(49.1% 0.109 264.4)
-
Step 800
800 (this color)
#31487B
oklch(40.9% 0.091 264.4)
-
Step 900
900
#2F4067
oklch(37.6% 0.071 265.3)
-
Step 950
950
#1B263C
oklch(27% 0.044 263.4)
#31487B 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) | #324D7D | 0.015 |
| Deuteranopia (no green cones) | #29467A | 0.012 |
| Tritanopia (no blue cones) | #00535B | 0.080 |
| Achromatopsia (no color) | #494949 | 0.091 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31487B
#31487B
oklch(40.9% 0.091 264.4)
- #5F4500
#5F4500
oklch(40.8% 0.084 84)
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 #31487B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.032
- Cobalt #1E488F ΔE 0.037
- Twilight Blue #0A437A ΔE 0.039
- Dusk Blue #26538D ΔE 0.039
- Deep Sea Blue #015482 ΔE 0.043
- Dark Slate Blue #483D8B ΔE 0.053
- Light Navy Blue #2E5A88 ΔE 0.053
- Dark Grey Blue #29465B ΔE 0.056
Use #31487B 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.