#F33A2B
Closest named color: Vermillion (#F4320C). oklch(63.2% 0.223 29.5), rgb(243, 58, 43).
Aa
Black text reads best on this color (5.45:1).
About this color
#F33A2B is a medium-light, vivid red. In OKLCH its lightness is 63%, its chroma 0.223 and its hue 29°. Its hue sits on the warm side of the wheel. The nearest named color is Vermillion (#F4320C), ΔE 0.015 away. Black text reads best on it, at 5.45:1.
| Hue family | Reds |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.223) |
| Temperature | warm |
| Nearest name | Vermillion (#F4320C) |
| Black text | 5.45:1 |
| White text | 3.85:1 |
Values
| HEX | #F33A2B |
| RGB | rgb(243, 58, 43) |
| HSL | hsl(5, 89%, 56%) |
| OKLCH | oklch(63.2% 0.223 29.5) |
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 #F33A2B | 3.85:1 | AA large text | Lc -69.8 | Content text, not long reading |
| Black text on #F33A2B | 5.45:1 | AA | Lc 39.7 | Non-text elements, placeholder text |
| #F33A2B text on white | 3.85:1 | AA large text | Lc 64.3 | Content text, not long reading |
| #F33A2B text on black | 5.45:1 | AA | Lc -37.3 | Non-text elements, placeholder text |
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 500.
-
Step 50
50
#FFF2F0
oklch(97.1% 0.014 28)
-
Step 100
100
#FEE3DE
oklch(93.6% 0.031 30.2)
-
Step 200
200
#FFCBC2
oklch(88.5% 0.061 29.7)
-
Step 300
300
#FFA697
oklch(81% 0.108 30.1)
-
Step 400
400
#FA6F5D
oklch(70.7% 0.174 29.5)
-
Step 500
500 (this color)
#F33A2B
oklch(63.2% 0.223 29.5)
-
Step 600
600
#D80500
oklch(55.5% 0.226 29.5)
-
Step 700
700
#B70300
oklch(49% 0.2 29.4)
-
Step 800
800
#980200
oklch(42.8% 0.174 29.4)
-
Step 900
900
#7D0D07
oklch(37.7% 0.145 29.4)
-
Step 950
950
#4A0D08
oklch(27.1% 0.092 29.3)
#F33A2B 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) | #746827 | 0.239 |
| Deuteranopia (no green cones) | #A29020 | 0.216 |
| Tritanopia (no blue cones) | #FF0039 | 0.043 |
| Achromatopsia (no color) | #828282 | 0.224 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #F33A2B
#F33A2B
oklch(63.2% 0.223 29.5)
- #009BAE
#009BAE
oklch(63.2% 0.109 210)
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 #F33A2B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vermillion #F4320C ΔE 0.015
- Orangey Red #FA4224 ΔE 0.021
- Red Orange #FD3C06 ΔE 0.026
- Tomato Red #EC2D01 ΔE 0.027
- Orangered #FE420F ΔE 0.031
- Strawberry #FB2943 ΔE 0.034
- Red Pantone #EF233C ΔE 0.035
- Fire Engine Red #FE0002 ΔE 0.035
Use #F33A2B 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.