#B43000
Closest named color: Rusty Red (#AF2F0D). oklch(51% 0.175 36), rgb(180, 48, 0).
Aa
White text reads best on this color (6.24:1).
About this color
#B43000 is a medium-dark, vivid red. In OKLCH its lightness is 51%, its chroma 0.175 and its hue 36°. Its hue sits on the warm side of the wheel. The nearest named color is Rusty Red (#AF2F0D), ΔE 0.012 away. White text reads best on it, at 6.24:1.
| Hue family | Reds |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.175) |
| Temperature | warm |
| Nearest name | Rusty Red (#AF2F0D) |
| Black text | 3.36:1 |
| White text | 6.24:1 |
Values
| HEX | #B43000 |
| RGB | rgb(180, 48, 0) |
| HSL | hsl(16, 100%, 35%) |
| OKLCH | oklch(51% 0.175 36) |
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 #B43000 | 6.24:1 | AA | Lc -84.9 | Fine for body text |
| Black text on #B43000 | 3.36:1 | AA large text | Lc 24.3 | Dividers and decoration only |
| #B43000 text on white | 6.24:1 | AA | Lc 79.7 | Fine for body text |
| #B43000 text on black | 3.36:1 | AA large text | Lc -22.1 | 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
#FDF3F0
oklch(97.1% 0.012 37.4)
-
Step 100
100
#FAE5DF
oklch(93.7% 0.025 36.5)
-
Step 200
200
#F6CFC4
oklch(88.5% 0.047 36.3)
-
Step 300
300
#F2AE9B
oklch(81% 0.085 36.2)
-
Step 400
400
#E87F63
oklch(70.7% 0.136 35.9)
-
Step 500
500
#DD5936
oklch(63% 0.173 35.7)
-
Step 600
600
#C93905
oklch(55.7% 0.188 36.1)
-
Step 700
700 (this color)
#B43000
oklch(51% 0.175 36)
-
Step 800
800
#8D2402
oklch(42.7% 0.146 35.7)
-
Step 900
900
#71250F
oklch(37.7% 0.112 36.3)
-
Step 950
950
#43170B
oklch(27.1% 0.072 36.1)
#B43000 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) | #594E00 | 0.181 |
| Deuteranopia (no green cones) | #7A6B00 | 0.161 |
| Tritanopia (no blue cones) | #C70029 | 0.059 |
| Achromatopsia (no color) | #606060 | 0.176 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #B43000
#B43000
oklch(51% 0.175 36)
- #007387
#007387
oklch(51.1% 0.091 215.4)
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 #B43000, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rusty Red #AF2F0D ΔE 0.012
- Rust Red #AA2704 ΔE 0.027
- Sinopia #BB3E03 ΔE 0.029
- Rufous #AE2012 ΔE 0.030
- Firebrick #B22222 ΔE 0.032
- Russet #A13905 ΔE 0.038
- Brick #A03623 ΔE 0.042
- Scarlet #BE0119 ΔE 0.045
Use #B43000 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.