#37429C
Closest named color: Blueberry (#464196). oklch(42.4% 0.146 273.2), rgb(55, 66, 156).
Aa
White text reads best on this color (8.67:1).
About this color
#37429C is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.146 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.024 away. White text reads best on it, at 8.67:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.42:1 |
| White text | 8.67:1 |
Values
| HEX | #37429C |
| RGB | rgb(55, 66, 156) |
| HSL | hsl(233, 48%, 41%) |
| OKLCH | oklch(42.4% 0.146 273.2) |
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 #37429C | 8.67:1 | AAA | Lc -93.9 | Preferred for body text |
| Black text on #37429C | 2.42:1 | Fails | Lc 14.6 | Not readable |
| #37429C text on white | 8.67:1 | AAA | Lc 89.4 | Fine for body text |
| #37429C 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
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4E9FB
oklch(93.6% 0.025 273.5)
-
Step 200
200
#CFD8F9
oklch(88.6% 0.047 273.4)
-
Step 300
300
#AEBDF8
oklch(80.8% 0.085 273.3)
-
Step 400
400
#8599F5
oklch(70.6% 0.136 273.2)
-
Step 500
500
#697DF1
oklch(63.1% 0.174 273.1)
-
Step 600
600
#5363E0
oklch(55.7% 0.189 273.1)
-
Step 700
700
#4451C2
oklch(49.1% 0.175 273.1)
-
Step 800
800 (this color)
#37429C
oklch(42.4% 0.146 273.2)
-
Step 900
900
#2F3A7D
oklch(37.8% 0.113 272.8)
-
Step 950
950
#1C2249
oklch(27% 0.072 274)
#37429C 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) | #00509F | 0.048 |
| Deuteranopia (no green cones) | #00479A | 0.042 |
| Tritanopia (no blue cones) | #005868 | 0.123 |
| Achromatopsia (no color) | #4B4B4B | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37429C
#37429C
oklch(42.4% 0.146 273.2)
- #5E4C00
#5E4C00
oklch(42.3% 0.087 93.2)
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 #37429C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.024
- Cobalt #1E488F ΔE 0.037
- Dark Slate Blue #483D8B ΔE 0.038
- Sapphire #2138AB ΔE 0.045
- Dusk Blue #26538D ΔE 0.056
- Twilight #4E518B ΔE 0.064
- Light Navy #155084 ΔE 0.065
- Blue Blue #2242C7 ΔE 0.072
Use #37429C 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.