#3F2980
Closest named color: Dark Slate Blue (#483D8B). oklch(36.2% 0.139 289.2), rgb(63, 41, 128).
Aa
White text reads best on this color (11.41:1).
About this color
#3F2980 is a dark, moderately saturated purple. In OKLCH its lightness is 36%, its chroma 0.139 and its hue 289°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Slate Blue (#483D8B), ΔE 0.055 away. White text reads best on it, at 11.41:1.
| Hue family | Purples |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Dark Slate Blue (#483D8B) |
| Black text | 1.84:1 |
| White text | 11.41:1 |
Values
| HEX | #3F2980 |
| RGB | rgb(63, 41, 128) |
| HSL | hsl(255, 51%, 33%) |
| OKLCH | oklch(36.2% 0.139 289.2) |
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 #3F2980 | 11.41:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #3F2980 | 1.84:1 | Fails | Lc 8.1 | Not readable |
| #3F2980 text on white | 11.41:1 | AAA | Lc 95.8 | Preferred for body text |
| #3F2980 text on black | 1.84:1 | 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
#F5F4FF
oklch(97.1% 0.015 290.3)
-
Step 100
100
#E9E7FD
oklch(93.6% 0.03 290)
-
Step 200
200
#D7D4FE
oklch(88.6% 0.058 288.4)
-
Step 300
300
#BEB6FF
oklch(80.9% 0.102 288.9)
-
Step 400
400
#9F8CFF
oklch(70.7% 0.164 289.1)
-
Step 500
500
#8B69FF
oklch(63.1% 0.213 289.3)
-
Step 600
600
#774AEE
oklch(55.6% 0.231 289.2)
-
Step 700
700
#6539CF
oklch(49.1% 0.215 289.4)
-
Step 800
800
#5231A8
oklch(42.8% 0.179 289.3)
-
Step 900
900 (this color)
#3F2980
oklch(36.2% 0.139 289.2)
-
Step 950
950
#271C4E
oklch(27.1% 0.088 289.3)
#3F2980 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) | #003C83 | 0.075 |
| Deuteranopia (no green cones) | #00387E | 0.074 |
| Tritanopia (no blue cones) | #293E50 | 0.113 |
| Achromatopsia (no color) | #3A3A3A | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3F2980
#3F2980
oklch(36.2% 0.139 289.2)
- #414000
#414000
oklch(36.1% 0.078 108.8)
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 #3F2980, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Blue #483D8B ΔE 0.055
- Indigo #4B0082 ΔE 0.058
- Blueberry #464196 ΔE 0.069
- Royal Purple #4B006E ΔE 0.072
- Imperial Purple #480CA8 ΔE 0.074
- Midnight Blue #191970 ΔE 0.084
- Indigo Blue #3A18B1 ΔE 0.085
- Twilight Blue #0A437A ΔE 0.085
Use #3F2980 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.