#37357A
Closest named color: Dark Slate Blue (#483D8B). oklch(37.1% 0.114 280.6), rgb(55, 53, 122).
Aa
White text reads best on this color (10.75:1).
About this color
#37357A is a dark, moderately saturated purple. In OKLCH its lightness is 37%, its chroma 0.114 and its hue 281°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.046 away. White text reads best on it, at 10.75:1.
| Hue family | Purples |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.95:1 |
| White text | 10.75:1 |
Values
| HEX | #37357A |
| RGB | rgb(55, 53, 122) |
| HSL | hsl(242, 39%, 34%) |
| OKLCH | oklch(37.1% 0.114 280.6) |
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 #37357A | 10.75:1 | AAA | Lc -98.6 | Preferred for body text |
| Black text on #37357A | 1.95:1 | Fails | Lc 9.2 | Not readable |
| #37357A text on white | 10.75:1 | AAA | Lc 94.7 | Preferred for body text |
| #37357A text on black | 1.95:1 | Fails | Lc -7.9 | 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 900.
-
Step 50
50
#F4F5FD
oklch(97.2% 0.011 280.5)
-
Step 100
100
#E6E8FB
oklch(93.5% 0.026 281.1)
-
Step 200
200
#D3D6F9
oklch(88.5% 0.048 281.5)
-
Step 300
300
#B6BBF7
oklch(80.9% 0.085 280.6)
-
Step 400
400
#9195F4
oklch(70.7% 0.138 280.4)
-
Step 500
500
#7978EF
oklch(63.2% 0.174 280.6)
-
Step 600
600
#645DDE
oklch(55.6% 0.19 280.7)
-
Step 700
700
#534CC1
oklch(49.2% 0.177 280.4)
-
Step 800
800
#443F9C
oklch(42.8% 0.147 280.6)
-
Step 900
900 (this color)
#37357A
oklch(37.1% 0.114 280.6)
-
Step 950
950
#212148
oklch(27.1% 0.071 280.6)
#37357A 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) | #0B407C | 0.050 |
| Deuteranopia (no green cones) | #013B79 | 0.052 |
| Tritanopia (no blue cones) | #1A4552 | 0.099 |
| Achromatopsia (no color) | #3E3E3E | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37357A
#37357A
oklch(37.1% 0.114 280.6)
- #494100
#494100
oklch(37.2% 0.078 101.5)
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 #37357A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.046
- Twilight Blue #0A437A ΔE 0.055
- Blueberry #464196 ΔE 0.061
- Cobalt #1E488F ΔE 0.062
- Marine Blue #01386A ΔE 0.063
- Prussian Blue #1D3557 ΔE 0.073
- Light Navy #155084 ΔE 0.078
- Marine #042E60 ΔE 0.080
Use #37357A 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.