#EF5F31
Closest named color: Orange Pant (#FB5607). oklch(66.5% 0.187 37.5), rgb(239, 95, 49).
Aa
Black text reads best on this color (6.35:1).
About this color
#EF5F31 is a medium-light, vivid red. In OKLCH its lightness is 66%, its chroma 0.187 and its hue 38°. Its hue sits on the warm side of the wheel. The nearest named color is Orange Pant (#FB5607), ΔE 0.026 away. Black text reads best on it, at 6.35:1.
| Hue family | Reds |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.187) |
| Temperature | warm |
| Nearest name | Orange Pant (#FB5607) |
| Black text | 6.35:1 |
| White text | 3.30:1 |
Values
| HEX | #EF5F31 |
| RGB | rgb(239, 95, 49) |
| HSL | hsl(15, 86%, 56%) |
| OKLCH | oklch(66.5% 0.187 37.5) |
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 #EF5F31 | 3.30:1 | AA large text | Lc -65.0 | Content text, not long reading |
| Black text on #EF5F31 | 6.35:1 | AA | Lc 44.5 | Non-text elements, placeholder text |
| #EF5F31 text on white | 3.30:1 | AA large text | Lc 59.5 | Large or bold text, headings |
| #EF5F31 text on black | 6.35:1 | AA | Lc -42.2 | 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
#FDF3F0
oklch(97.1% 0.012 37.4)
-
Step 100
100
#FBE4DD
oklch(93.6% 0.027 37.6)
-
Step 200
200
#F8CEC1
oklch(88.4% 0.051 37.9)
-
Step 300
300
#F5AC96
oklch(80.9% 0.092 37.5)
-
Step 400
400
#EC7C5A
oklch(70.6% 0.147 37.7)
-
Step 500
500 (this color)
#EF5F31
oklch(66.5% 0.187 37.5)
-
Step 600
600
#C73C00
oklch(55.6% 0.184 37.5)
-
Step 700
700
#A83100
oklch(49% 0.162 37.4)
-
Step 800
800
#8B2700
oklch(42.7% 0.141 37.5)
-
Step 900
900
#742102
oklch(37.7% 0.122 37.8)
-
Step 950
950
#441506
oklch(26.9% 0.077 37.9)
#EF5F31 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) | #88792A | 0.187 |
| Deuteranopia (no green cones) | #AB992B | 0.171 |
| Tritanopia (no blue cones) | #FF3B56 | 0.078 |
| Achromatopsia (no color) | #8D8D8D | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EF5F31
#EF5F31
oklch(66.5% 0.187 37.5)
- #00A4C3
#00A4C3
oklch(66.3% 0.119 217.6)
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 #EF5F31, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Orange Pant #FB5607 ΔE 0.026
- Bright Orange #FF5B00 ΔE 0.033
- Burnt Sienna #E76F51 ΔE 0.035
- Blood Orange #FE4B03 ΔE 0.037
- Tomato #FF6347 ΔE 0.037
- Orange Red #FF4500 ΔE 0.043
- Orangey Red #FA4224 ΔE 0.044
- Orangered #FE420F ΔE 0.045
Use #EF5F31 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.