#31429B
Closest named color: Blueberry (#464196). oklch(42% 0.146 270.6), rgb(49, 66, 155).
Aa
White text reads best on this color (8.81:1).
About this color
#31429B is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.146 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.030 away. White text reads best on it, at 8.81:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.38:1 |
| White text | 8.81:1 |
Values
| HEX | #31429B |
| RGB | rgb(49, 66, 155) |
| HSL | hsl(230, 52%, 40%) |
| OKLCH | oklch(42% 0.146 270.6) |
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 #31429B | 8.81:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #31429B | 2.38:1 | Fails | Lc 14.2 | Not readable |
| #31429B text on white | 8.81:1 | AAA | Lc 89.7 | Fine for body text |
| #31429B text on black | 2.38:1 | Fails | Lc -12.5 | 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
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3E9FB
oklch(93.5% 0.025 271.1)
-
Step 200
200
#CDD8F9
oklch(88.4% 0.047 270.8)
-
Step 300
300
#ACBEF9
oklch(80.9% 0.086 271.2)
-
Step 400
400
#819BF5
oklch(70.8% 0.135 270.5)
-
Step 500
500
#637EF2
oklch(63% 0.176 270.8)
-
Step 600
600
#4C64E0
oklch(55.5% 0.19 270.7)
-
Step 700
700
#3E52C3
oklch(49.1% 0.177 270.8)
-
Step 800
800 (this color)
#31429B
oklch(42% 0.146 270.6)
-
Step 900
900
#2C3B7D
oklch(37.8% 0.113 270.5)
-
Step 950
950
#1A2349
oklch(27.1% 0.071 270.9)
#31429B 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) | #004F9E | 0.042 |
| Deuteranopia (no green cones) | #004699 | 0.035 |
| Tritanopia (no blue cones) | #005868 | 0.120 |
| Achromatopsia (no color) | #4A4A4A | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #31429B
#31429B
oklch(42% 0.146 270.6)
- #5F4A00
#5F4A00
oklch(41.9% 0.086 90)
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 #31429B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.030
- Cobalt #1E488F ΔE 0.032
- Sapphire #2138AB ΔE 0.041
- Dark Slate Blue #483D8B ΔE 0.042
- Dusk Blue #26538D ΔE 0.054
- Light Navy #155084 ΔE 0.061
- Twilight Blue #0A437A ΔE 0.066
- Twilight #4E518B ΔE 0.069
Use #31429B 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.