#B31578
Closest named color: Medium Violet Red (#C71585). oklch(51.3% 0.203 349.5), rgb(179, 21, 120).
Aa
White text reads best on this color (6.37:1).
About this color
#B31578 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.203 and its hue 349°. Its hue sits on the warm side of the wheel. The nearest named color is Medium Violet Red (#C71585), ΔE 0.044 away. White text reads best on it, at 6.37:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.203) |
| Temperature | warm |
| Nearest name | Medium Violet Red (#C71585) |
| Black text | 3.29:1 |
| White text | 6.37:1 |
Values
| HEX | #B31578 |
| RGB | rgb(179, 21, 120) |
| HSL | hsl(322, 79%, 39%) |
| OKLCH | oklch(51.3% 0.203 349.5) |
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 #B31578 | 6.37:1 | AA | Lc -85.0 | Fine for body text |
| Black text on #B31578 | 3.29:1 | AA large text | Lc 24.2 | Dividers and decoration only |
| #B31578 text on white | 6.37:1 | AA | Lc 79.8 | Fine for body text |
| #B31578 text on black | 3.29:1 | AA large text | Lc -22.0 | 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
#FAE3ED
oklch(93.7% 0.028 349.5)
-
Step 200
200
#F6CBDE
oklch(88.4% 0.054 349.9)
-
Step 300
300
#F1A7CA
oklch(80.9% 0.097 349.6)
-
Step 400
400
#E773AF
oklch(70.7% 0.158 349.6)
-
Step 500
500
#DC479B
oklch(63.1% 0.201 349.7)
-
Step 600
600
#C71B86
oklch(55.6% 0.219 349.5)
-
Step 700
700 (this color)
#B31578
oklch(51.3% 0.203 349.5)
-
Step 800
800
#8B0F5C
oklch(42.7% 0.168 349.7)
-
Step 900
900
#70194C
oklch(37.7% 0.131 349.3)
-
Step 950
950
#42112C
oklch(27% 0.082 350)
#B31578 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) | #374E7A | 0.231 |
| Deuteranopia (no green cones) | #656975 | 0.201 |
| Tritanopia (no blue cones) | #C10048 | 0.079 |
| Achromatopsia (no color) | #5F5F5F | 0.205 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B31578
#B31578
oklch(51.3% 0.203 349.5)
- #00795D
#00795D
oklch(51.2% 0.102 169.5)
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 #B31578, closest first.
No curated palette has a color within ΔE 0.04 of #B31578.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Violet Red #C71585 ΔE 0.044
- Red Violet #9E0168 ΔE 0.052
- Deep Magenta #A0025C ΔE 0.059
- Violet Red #A50055 ΔE 0.061
- Dark Fuchsia #9D0759 ΔE 0.065
- Warm Purple #952E8F ΔE 0.071
- Raspberry #B00149 ΔE 0.072
- Dark Hot Pink #D90166 ΔE 0.084
Use #B31578 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.