#B30318
Closest named color: Firebrick (#B22222). oklch(48.4% 0.195 25.9), rgb(179, 3, 24).
Aa
White text reads best on this color (7.13:1).
About this color
#B30318 is a medium-dark, vivid red. In OKLCH its lightness is 48%, its chroma 0.195 and its hue 26°. Its hue sits on the warm side of the wheel. The nearest named color is Firebrick (#B22222), ΔE 0.021 away. White text reads best on it, at 7.13:1.
| Hue family | Reds |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.195) |
| Temperature | warm |
| Nearest name | Firebrick (#B22222) |
| Black text | 2.94:1 |
| White text | 7.13:1 |
Values
| HEX | #B30318 |
| RGB | rgb(179, 3, 24) |
| HSL | hsl(353, 97%, 36%) |
| OKLCH | oklch(48.4% 0.195 25.9) |
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 #B30318 | 7.13:1 | AAA | Lc -87.3 | Fine for body text |
| Black text on #B30318 | 2.94:1 | Fails | Lc 21.9 | Dividers and decoration only |
| #B30318 text on white | 7.13:1 | AAA | Lc 82.2 | Fine for body text |
| #B30318 text on black | 2.94:1 | Fails | Lc -19.7 | 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
#FEF2F1
oklch(97% 0.013 23.2)
-
Step 100
100
#FCE3E0
oklch(93.5% 0.028 25.9)
-
Step 200
200
#FACDC7
oklch(88.6% 0.052 27)
-
Step 300
300
#F8A9A1
oklch(80.9% 0.095 25.8)
-
Step 400
400
#F0776E
oklch(70.7% 0.151 25.9)
-
Step 500
500
#E74B47
oklch(63.1% 0.193 25.8)
-
Step 600
600
#D22028
oklch(55.5% 0.209 25.9)
-
Step 700
700 (this color)
#B30318
oklch(48.4% 0.195 25.9)
-
Step 800
800
#931219
oklch(42.6% 0.161 25.7)
-
Step 900
900
#761B1A
oklch(37.6% 0.126 26.1)
-
Step 950
950
#461210
oklch(27% 0.08 26.2)
#B30318 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) | #4A4116 | 0.215 |
| Deuteranopia (no green cones) | #71640C | 0.194 |
| Tritanopia (no blue cones) | #C60011 | 0.040 |
| Achromatopsia (no color) | #585858 | 0.197 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B30318
#B30318
oklch(48.4% 0.195 25.9)
- #006C75
#006C75
oklch(48.5% 0.083 204.9)
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 #B30318, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Firebrick #B22222 ΔE 0.021
- Rufous #AE2012 ΔE 0.022
- Scarlet #BE0119 ΔE 0.023
- Rust Red #AA2704 ΔE 0.035
- Lipstick Red #C0022F ΔE 0.035
- Brown #A52A2A ΔE 0.036
- Rouge #AB1239 ΔE 0.037
- Rusty Red #AF2F0D ΔE 0.041
Use #B30318 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.