#F3551F
Closest named color: Orange Pant (#FB5607). oklch(65.8% 0.203 37.3), rgb(243, 85, 31).
Aa
Black text reads best on this color (6.13:1).
About this color
#F3551F is a medium-light, vivid red. In OKLCH its lightness is 66%, its chroma 0.203 and its hue 37°. Its hue sits on the warm side of the wheel. The nearest named color is Orange Pant (#FB5607), ΔE 0.017 away. Black text reads best on it, at 6.13:1.
| Hue family | Reds |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.203) |
| Temperature | warm |
| Nearest name | Orange Pant (#FB5607) |
| Black text | 6.13:1 |
| White text | 3.42:1 |
Values
| HEX | #F3551F |
| RGB | rgb(243, 85, 31) |
| HSL | hsl(15, 90%, 54%) |
| OKLCH | oklch(65.8% 0.203 37.3) |
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 #F3551F | 3.42:1 | AA large text | Lc -66.1 | Content text, not long reading |
| Black text on #F3551F | 6.13:1 | AA | Lc 43.4 | Non-text elements, placeholder text |
| #F3551F text on white | 3.42:1 | AA large text | Lc 60.6 | Content text, not long reading |
| #F3551F text on black | 6.13:1 | AA | Lc -41.1 | 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
#FEF3EF
oklch(97.2% 0.013 41.2)
-
Step 100
100
#FCE4DC
oklch(93.6% 0.029 39.3)
-
Step 200
200
#FBCDC0
oklch(88.5% 0.055 36.3)
-
Step 300
300
#F9AA93
oklch(80.9% 0.099 36.9)
-
Step 400
400
#F27854
oklch(70.7% 0.159 37.2)
-
Step 500
500 (this color)
#F3551F
oklch(65.8% 0.203 37.3)
-
Step 600
600
#C73B00
oklch(55.5% 0.185 37.2)
-
Step 700
700
#A93100
oklch(49.2% 0.163 37.3)
-
Step 800
800
#8B2700
oklch(42.7% 0.141 37.5)
-
Step 900
900
#751F00
oklch(37.6% 0.125 37.3)
-
Step 950
950
#471203
oklch(27% 0.085 36.9)
#F3551F 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) | #847413 | 0.205 |
| Deuteranopia (no green cones) | #AA9813 | 0.188 |
| Tritanopia (no blue cones) | #FF224B | 0.081 |
| Achromatopsia (no color) | #8B8B8B | 0.204 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #F3551F
#F3551F
oklch(65.8% 0.203 37.3)
- #00A2C0
#00A2C0
oklch(65.7% 0.117 217.2)
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 #F3551F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Orange Pant #FB5607 ΔE 0.017
- Blood Orange #FE4B03 ΔE 0.022
- Orange Red #FF4500 ΔE 0.027
- Bright Orange #FF5B00 ΔE 0.029
- Orangered #FE420F ΔE 0.029
- Orangey Red #FA4224 ΔE 0.030
- Red Orange #FD3C06 ΔE 0.034
- Tomato #FF6347 ΔE 0.043
Use #F3551F 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.