#F33929
Closest named color: Vermillion (#F4320C). oklch(63.1% 0.223 29.7), rgb(243, 57, 41).
Aa
Black text reads best on this color (5.42:1).
About this color
#F33929 is a medium-light, vivid red. In OKLCH its lightness is 63%, its chroma 0.223 and its hue 30°. Its hue sits on the warm side of the wheel. The nearest named color is Vermillion (#F4320C), ΔE 0.014 away. Black text reads best on it, at 5.42:1.
| Hue family | Reds |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.223) |
| Temperature | warm |
| Nearest name | Vermillion (#F4320C) |
| Black text | 5.42:1 |
| White text | 3.86:1 |
Values
| HEX | #F33929 |
| RGB | rgb(243, 57, 41) |
| HSL | hsl(5, 89%, 56%) |
| OKLCH | oklch(63.1% 0.223 29.7) |
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 #F33929 | 3.86:1 | AA large text | Lc -70.0 | Content text, not long reading |
| Black text on #F33929 | 5.42:1 | AA | Lc 39.6 | Non-text elements, placeholder text |
| #F33929 text on white | 3.86:1 | AA large text | Lc 64.5 | Content text, not long reading |
| #F33929 text on black | 5.42:1 | AA | Lc -37.2 | 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
#FA6F5C
oklch(70.7% 0.174 29.9)
-
Step 500
500 (this color)
#F33929
oklch(63.1% 0.223 29.7)
-
Step 600
600
#D80900
oklch(55.6% 0.225 29.6)
-
Step 700
700
#B70700
oklch(49.1% 0.199 29.7)
-
Step 800
800
#970400
oklch(42.6% 0.173 29.6)
-
Step 900
900
#7D0C05
oklch(37.7% 0.146 29.7)
-
Step 950
950
#4A0D07
oklch(27.1% 0.092 30)
#F33929 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) | #746724 | 0.240 |
| Deuteranopia (no green cones) | #A2901E | 0.217 |
| Tritanopia (no blue cones) | #FF0038 | 0.043 |
| Achromatopsia (no color) | #828282 | 0.225 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #F33929
#F33929
oklch(63.1% 0.223 29.7)
- #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 #F33929, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vermillion #F4320C ΔE 0.014
- Orangey Red #FA4224 ΔE 0.021
- Tomato Red #EC2D01 ΔE 0.026
- Red Orange #FD3C06 ΔE 0.026
- Orangered #FE420F ΔE 0.031
- Fire Engine Red #FE0002 ΔE 0.034
- Strawberry #FB2943 ΔE 0.034
- Bright Red #FF000D ΔE 0.034
Use #F33929 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.