#EF621B
Closest named color: Orange Pant (#FB5607). oklch(66.7% 0.189 42.3), rgb(239, 98, 27).
Aa
Black text reads best on this color (6.43:1).
About this color
#EF621B is a medium-light, vivid orange. In OKLCH its lightness is 67%, its chroma 0.189 and its hue 42°. 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 6.43:1.
| Hue family | Oranges |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.189) |
| Temperature | warm |
| Nearest name | Orange Pant (#FB5607) |
| Black text | 6.43:1 |
| White text | 3.26:1 |
Values
| HEX | #EF621B |
| RGB | rgb(239, 98, 27) |
| HSL | hsl(20, 87%, 52%) |
| OKLCH | oklch(66.7% 0.189 42.3) |
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 #EF621B | 3.26:1 | AA large text | Lc -64.5 | Content text, not long reading |
| Black text on #EF621B | 6.43:1 | AA | Lc 45.0 | Large or bold text, headings |
| #EF621B text on white | 3.26:1 | AA large text | Lc 59.1 | Large or bold text, headings |
| #EF621B text on black | 6.43:1 | AA | Lc -42.7 | 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
#FDF3EF
oklch(97.1% 0.012 43.3)
-
Step 100
100
#FBE5DC
oklch(93.7% 0.027 43.7)
-
Step 200
200
#F8CFBF
oklch(88.5% 0.051 42.4)
-
Step 300
300
#F4AD91
oklch(80.8% 0.092 42.4)
-
Step 400
400
#EC7E51
oklch(70.8% 0.148 42.2)
-
Step 500
500 (this color)
#EF621B
oklch(66.7% 0.189 42.3)
-
Step 600
600
#BF4700
oklch(55.5% 0.167 42.1)
-
Step 700
700
#A13B00
oklch(49% 0.147 42.3)
-
Step 800
800
#852F00
oklch(42.6% 0.128 42.2)
-
Step 900
900
#702700
oklch(37.7% 0.113 42.6)
-
Step 950
950
#441602
oklch(27% 0.077 42.4)
#EF621B 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) | #8B7A08 | 0.183 |
| Deuteranopia (no green cones) | #AD9A11 | 0.165 |
| Tritanopia (no blue cones) | #FF3E55 | 0.088 |
| Achromatopsia (no color) | #8E8E8E | 0.190 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #EF621B
#EF621B
oklch(66.7% 0.189 42.3)
- #00A4CB
#00A4CB
oklch(66.7% 0.124 222.7)
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 #EF621B, 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 0.029
- Blood Orange #FE4B03 ΔE 0.041
- Burnt Sienna #E76F51 ΔE 0.041
- Tomato #FF6347 ΔE 0.045
- Orange Red #FF4500 ΔE 0.048
- Pumpkin #E17701 ΔE 0.050
- Orangered #FE420F ΔE 0.052
Use #EF621B 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.