#37379A
Closest named color: Blueberry (#464196). oklch(40.2% 0.157 276.7), rgb(55, 55, 154).
Aa
White text reads best on this color (9.65:1).
About this color
#37379A is a dark, vivid blue. In OKLCH its lightness is 40%, its chroma 0.157 and its hue 277°. Its hue sits on the cool side of the wheel. The nearest named color is Blueberry (#464196), ΔE 0.037 away. White text reads best on it, at 9.65:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Blueberry (#464196) |
| Black text | 2.17:1 |
| White text | 9.65:1 |
Values
| HEX | #37379A |
| RGB | rgb(55, 55, 154) |
| HSL | hsl(240, 47%, 41%) |
| OKLCH | oklch(40.2% 0.157 276.7) |
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 #37379A | 9.65:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #37379A | 2.17:1 | Fails | Lc 12.1 | Not readable |
| #37379A text on white | 9.65:1 | AAA | Lc 91.9 | Preferred for body text |
| #37379A text on black | 2.17:1 | Fails | Lc -10.5 | 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 900.
-
Step 50
50
#F3F5FF
oklch(97.2% 0.013 277.1)
-
Step 100
100
#E4E9FF
oklch(93.7% 0.03 275.6)
-
Step 200
200
#CFD7FF
oklch(88.6% 0.056 276.3)
-
Step 300
300
#B0BBFF
oklch(80.8% 0.097 276.9)
-
Step 400
400
#8995FF
oklch(70.7% 0.154 276.8)
-
Step 500
500
#6E76FF
oklch(63.1% 0.2 276.5)
-
Step 600
600
#5951FF
oklch(55.7% 0.247 276.7)
-
Step 700
700
#4A3AE5
oklch(49.1% 0.243 276.8)
-
Step 800
800
#3C32B9
oklch(42.7% 0.202 276.9)
-
Step 900
900 (this color)
#37379A
oklch(40.2% 0.157 276.7)
-
Step 950
950
#1C1D55
oklch(26.9% 0.099 276.6)
#37379A 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) | #00499D | 0.056 |
| Deuteranopia (no green cones) | #004098 | 0.048 |
| Tritanopia (no blue cones) | #005063 | 0.131 |
| Achromatopsia (no color) | #454545 | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37379A
#37379A
oklch(40.2% 0.157 276.7)
- #554800
#554800
oklch(40.3% 0.083 97.3)
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 #37379A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blueberry #464196 ΔE 0.037
- Sapphire #2138AB ΔE 0.038
- Dark Slate Blue #483D8B ΔE 0.041
- Cobalt #1E488F ΔE 0.052
- Indigo Blue #3A18B1 ΔE 0.060
- Imperial Purple #480CA8 ΔE 0.067
- Twilight Blue #0A437A ΔE 0.076
- Majorelle Blue #3F37C9 ΔE 0.077
Use #37379A 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.