#37489B
Closest named color: Blueberry (#464196). oklch(43.5% 0.136 271), rgb(55, 72, 155).
Aa
White text reads best on this color (8.19:1).
About this color
#37489B is a dark, moderately saturated blue. In OKLCH its lightness is 44%, its chroma 0.136 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.026 away. White text reads best on it, at 8.19:1.
| Hue family | Blues |
| Lightness | dark (44%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.56:1 |
| White text | 8.19:1 |
Values
| HEX | #37489B |
| RGB | rgb(55, 72, 155) |
| HSL | hsl(230, 48%, 41%) |
| OKLCH | oklch(43.5% 0.136 271) |
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 #37489B | 8.19:1 | AAA | Lc -92.7 | Preferred for body text |
| Black text on #37489B | 2.56:1 | Fails | Lc 16.0 | Dividers and decoration only |
| #37489B text on white | 8.19:1 | AAA | Lc 88.0 | Fine for body text |
| #37489B text on black | 2.56:1 | Fails | Lc -14.1 | 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
#E4E9FA
oklch(93.5% 0.024 272.8)
-
Step 200
200
#CED8F7
oklch(88.4% 0.044 271.3)
-
Step 300
300
#ADBEF5
oklch(80.8% 0.08 271.2)
-
Step 400
400
#839BF0
oklch(70.7% 0.128 270.9)
-
Step 500
500
#6680EB
oklch(63.2% 0.163 270.8)
-
Step 600
600
#4F66D9
oklch(55.5% 0.177 271)
-
Step 700
700
#4054BC
oklch(49% 0.164 270.9)
-
Step 800
800 (this color)
#37489B
oklch(43.5% 0.136 271)
-
Step 900
900
#2E3B79
oklch(37.6% 0.106 271.5)
-
Step 950
950
#1B2347
oklch(27% 0.068 271.8)
#37489B 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) | #14549E | 0.039 |
| Deuteranopia (no green cones) | #004B99 | 0.040 |
| Tritanopia (no blue cones) | #005B6A | 0.114 |
| Achromatopsia (no color) | #4F4F4F | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37489B
#37489B
oklch(43.5% 0.136 271)
- #644F00
#644F00
oklch(43.7% 0.089 91.1)
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 #37489B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.026
- Cobalt #1E488F ΔE 0.034
- Dark Slate Blue #483D8B ΔE 0.042
- Dusk Blue #26538D ΔE 0.043
- Twilight #4E518B ΔE 0.052
- Light Navy #155084 ΔE 0.056
- Sapphire #2138AB ΔE 0.056
- Denim Blue #3B5B92 ΔE 0.058
Use #37489B 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.