#901866
Closest named color: Red Violet (#9E0168). oklch(44.5% 0.17 346.8), rgb(144, 24, 102).
Aa
White text reads best on this color (8.37:1).
About this color
#901866 is a dark, vivid red. In OKLCH its lightness is 45%, its chroma 0.170 and its hue 347°. Its hue sits on the warm side of the wheel. The nearest named color is Red Violet (#9E0168), ΔE 0.029 away. White text reads best on it, at 8.37:1.
| Hue family | Reds |
| Lightness | dark (45%) |
| Chroma | vivid (0.170) |
| Temperature | warm |
| Nearest name | Red Violet (#9E0168) |
| Black text | 2.50:1 |
| White text | 8.37:1 |
Values
| HEX | #901866 |
| RGB | rgb(144, 24, 102) |
| HSL | hsl(321, 71%, 33%) |
| OKLCH | oklch(44.5% 0.17 346.8) |
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 #901866 | 8.37:1 | AAA | Lc -92.1 | Preferred for body text |
| Black text on #901866 | 2.50:1 | Fails | Lc 16.6 | Dividers and decoration only |
| #901866 text on white | 8.37:1 | AAA | Lc 87.4 | Fine for body text |
| #901866 text on black | 2.50:1 | Fails | Lc -14.7 | 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
#FDF2F7
oklch(97.1% 0.013 347.9)
-
Step 100
100
#F9E3EE
oklch(93.7% 0.028 345.9)
-
Step 200
200
#F6CBE0
oklch(88.5% 0.055 347.3)
-
Step 300
300
#F0A7CD
oklch(80.9% 0.098 347)
-
Step 400
400
#E573B4
oklch(70.6% 0.159 346.6)
-
Step 500
500
#DA47A1
oklch(63% 0.203 346.8)
-
Step 600
600
#C51B8C
oklch(55.5% 0.221 346.7)
-
Step 700
700
#AA0577
oklch(49.1% 0.205 346.8)
-
Step 800
800 (this color)
#901866
oklch(44.5% 0.17 346.8)
-
Step 900
900
#6F194F
oklch(37.7% 0.132 346.8)
-
Step 950
950
#42112E
oklch(27.1% 0.084 347.6)
#901866 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) | #2C4168 | 0.191 |
| Deuteranopia (no green cones) | #505563 | 0.166 |
| Tritanopia (no blue cones) | #9B123E | 0.070 |
| Achromatopsia (no color) | #4E4E4E | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #901866
#901866
oklch(44.5% 0.17 346.8)
- #006449
#006449
oklch(44.6% 0.092 166.6)
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 #901866, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Red Violet #9E0168 ΔE 0.029
- Dark Fuchsia #9D0759 ΔE 0.034
- Deep Magenta #A0025C ΔE 0.037
- Mulberry #920A4E ΔE 0.039
- Berry #990F4B ΔE 0.048
- Violet Red #A50055 ΔE 0.052
- Purple Red #990147 ΔE 0.053
- Red Purple #820747 ΔE 0.058
Use #901866 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.