#31439E
Closest named color: Blueberry (#464196). oklch(42.4% 0.149 270.3), rgb(49, 67, 158).
Aa
White text reads best on this color (8.65:1).
About this color
#31439E is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.149 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.032 away. White text reads best on it, at 8.65:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.42:1 |
| White text | 8.65:1 |
Values
| HEX | #31439E |
| RGB | rgb(49, 67, 158) |
| HSL | hsl(230, 53%, 41%) |
| OKLCH | oklch(42.4% 0.149 270.3) |
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 #31439E | 8.65:1 | AAA | Lc -93.8 | Preferred for body text |
| Black text on #31439E | 2.42:1 | Fails | Lc 14.7 | Not readable |
| #31439E text on white | 8.65:1 | AAA | Lc 89.3 | Fine for body text |
| #31439E text on black | 2.42:1 | Fails | Lc -12.9 | 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
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E3E9FB
oklch(93.5% 0.025 271.1)
-
Step 200
200
#CDD8FA
oklch(88.5% 0.048 271.2)
-
Step 300
300
#ABBEFA
oklch(80.9% 0.088 270.8)
-
Step 400
400
#809AF7
oklch(70.6% 0.139 270.7)
-
Step 500
500
#627EF4
oklch(63.1% 0.179 270.5)
-
Step 600
600
#4B64E2
oklch(55.6% 0.193 270.4)
-
Step 700
700
#3D52C5
oklch(49.2% 0.18 270.5)
-
Step 800
800 (this color)
#31439E
oklch(42.4% 0.149 270.3)
-
Step 900
900
#2B3A7E
oklch(37.6% 0.116 270.5)
-
Step 950
950
#19234A
oklch(27.1% 0.073 270.1)
#31439E 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) | #0051A1 | 0.043 |
| Deuteranopia (no green cones) | #00479C | 0.034 |
| Tritanopia (no blue cones) | #00596A | 0.121 |
| Achromatopsia (no color) | #4C4C4C | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31439E
#31439E
oklch(42.4% 0.149 270.3)
- #604B00
#604B00
oklch(42.3% 0.086 90.2)
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 #31439E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.032
- Cobalt #1E488F ΔE 0.034
- Sapphire #2138AB ΔE 0.040
- Dark Slate Blue #483D8B ΔE 0.045
- Dusk Blue #26538D ΔE 0.055
- Light Navy #155084 ΔE 0.063
- Blue Blue #2242C7 ΔE 0.067
- Twilight #4E518B ΔE 0.069
Use #31439E 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.