#B31981
Closest named color: Medium Violet Red (#C71585). oklch(51.9% 0.206 345.9), rgb(179, 25, 129).
Aa
White text reads best on this color (6.22:1).
About this color
#B31981 is a medium-dark, vivid red. In OKLCH its lightness is 52%, its chroma 0.206 and its hue 346°. Its hue sits on the warm side of the wheel. The nearest named color is Medium Violet Red (#C71585), ΔE 0.041 away. White text reads best on it, at 6.22:1.
| Hue family | Reds |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.206) |
| Temperature | warm |
| Nearest name | Medium Violet Red (#C71585) |
| Black text | 3.37:1 |
| White text | 6.22:1 |
Values
| HEX | #B31981 |
| RGB | rgb(179, 25, 129) |
| HSL | hsl(319, 75%, 40%) |
| OKLCH | oklch(51.9% 0.206 345.9) |
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 #B31981 | 6.22:1 | AA | Lc -84.5 | Fine for body text |
| Black text on #B31981 | 3.37:1 | AA large text | Lc 24.8 | Dividers and decoration only |
| #B31981 text on white | 6.22:1 | AA | Lc 79.3 | Fine for body text |
| #B31981 text on black | 3.37:1 | AA large text | Lc -22.5 | Dividers and decoration only |
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 700.
-
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
#F5CBE1
oklch(88.4% 0.055 345.4)
-
Step 300
300
#F0A7CE
oklch(81% 0.099 346.2)
-
Step 400
400
#E573B5
oklch(70.7% 0.16 346.2)
-
Step 500
500
#DA47A3
oklch(63.1% 0.204 346)
-
Step 600
600
#C51C8E
oklch(55.7% 0.221 346)
-
Step 700
700 (this color)
#B31981
oklch(51.9% 0.206 345.9)
-
Step 800
800
#8A0F62
oklch(42.7% 0.171 346.2)
-
Step 900
900
#6F1950
oklch(37.7% 0.133 346.1)
-
Step 950
950
#41112F
oklch(27% 0.083 345.7)
#B31981 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) | #345083 | 0.232 |
| Deuteranopia (no green cones) | #636A7E | 0.200 |
| Tritanopia (no blue cones) | #C0124E | 0.086 |
| Achromatopsia (no color) | #616161 | 0.207 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B31981
#B31981
oklch(51.9% 0.206 345.9)
- #007C5A
#007C5A
oklch(52% 0.108 165.8)
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 #B31981, closest first.
No curated palette has a color within ΔE 0.04 of #B31981.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Violet Red #C71585 ΔE 0.041
- Red Violet #9E0168 ΔE 0.060
- Warm Purple #952E8F ΔE 0.065
- Deep Magenta #A0025C ΔE 0.069
- Violet Red #A50055 ΔE 0.073
- Dark Fuchsia #9D0759 ΔE 0.076
- Raspberry #B00149 ΔE 0.085
- Dark Hot Pink #D90166 ΔE 0.090
Use #B31981 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.