#37277F
Closest named color: Indigo (#4B0082). oklch(35% 0.141 284.8), rgb(55, 39, 127).
Aa
White text reads best on this color (11.93:1).
About this color
#37277F is a dark, vivid purple. In OKLCH its lightness is 35%, its chroma 0.141 and its hue 285°. Its hue sits on the cool side of the wheel. The nearest named color is Indigo (#4B0082), ΔE 0.061 away. White text reads best on it, at 11.93:1.
| Hue family | Purples |
| Lightness | dark (35%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Indigo (#4B0082) |
| Black text | 1.75:1 |
| White text | 11.93:1 |
Values
| HEX | #37277F |
| RGB | rgb(55, 39, 127) |
| HSL | hsl(251, 53%, 33%) |
| OKLCH | oklch(35% 0.141 284.8) |
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 #37277F | 11.93:1 | AAA | Lc -100.5 | Preferred for body text |
| Black text on #37277F | 1.75:1 | Fails | Lc 0.0 | Not readable |
| #37277F text on white | 11.93:1 | AAA | Lc 96.8 | Preferred for body text |
| #37277F text on black | 1.75:1 | Fails | Lc 0.0 | 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
#F4F4FF
oklch(97% 0.015 286.1)
-
Step 100
100
#E7E8FE
oklch(93.7% 0.03 283.7)
-
Step 200
200
#D4D5FF
oklch(88.6% 0.058 284.1)
-
Step 300
300
#B9B8FF
oklch(80.9% 0.1 284.6)
-
Step 400
400
#978FFF
oklch(70.6% 0.16 284.8)
-
Step 500
500
#816EFF
oklch(63.1% 0.207 284.7)
-
Step 600
600
#6D4DF3
oklch(55.6% 0.234 284.6)
-
Step 700
700
#5C3CD4
oklch(49.1% 0.218 284.7)
-
Step 800
800
#4B33AB
oklch(42.7% 0.181 285)
-
Step 900
900 (this color)
#37277F
oklch(35% 0.141 284.8)
-
Step 950
950
#241D4F
oklch(27.1% 0.088 285.2)
#37277F 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) | #003982 | 0.065 |
| Deuteranopia (no green cones) | #00347D | 0.062 |
| Tritanopia (no blue cones) | #173D4F | 0.117 |
| Achromatopsia (no color) | #373737 | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #37277F
#37277F
oklch(35% 0.141 284.8)
- #413C00
#413C00
oklch(35% 0.074 104.3)
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 #37277F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Indigo #4B0082 ΔE 0.061
- Dark Slate Blue #483D8B ΔE 0.066
- Midnight Blue #191970 ΔE 0.069
- Royal Purple #4B006E ΔE 0.075
- Imperial Purple #480CA8 ΔE 0.077
- Marine Blue #01386A ΔE 0.078
- Royal #0C1793 ΔE 0.078
- Blueberry #464196 ΔE 0.079
Use #37277F 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.