#239FFF
Closest named color: Chefchaouen Blue (#4895EF). oklch(68.6% 0.174 248.3), rgb(35, 159, 255).
Aa
Black text reads best on this color (7.47:1).
About this color
#239FFF is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.174 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.034 away. Black text reads best on it, at 7.47:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.174) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.47:1 |
| White text | 2.80:1 |
Values
| HEX | #239FFF |
| RGB | rgb(35, 159, 255) |
| HSL | hsl(206, 100%, 57%) |
| OKLCH | oklch(68.6% 0.174 248.3) |
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 #239FFF | 2.80:1 | Fails | Lc -58.7 | Large or bold text, headings |
| Black text on #239FFF | 7.47:1 | AAA | Lc 50.6 | Large or bold text, headings |
| #239FFF text on white | 2.80:1 | Fails | Lc 53.5 | Large or bold text, headings |
| #239FFF text on black | 7.47:1 | AAA | Lc -48.4 | Large or bold text, headings |
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 400.
-
Step 50
50
#EEF7FF
oklch(97.2% 0.014 244.7)
-
Step 100
100
#DAECFE
oklch(93.5% 0.031 248.2)
-
Step 200
200
#BBDDFF
oklch(88.4% 0.059 248.5)
-
Step 300
300
#8CC6FF
oklch(80.8% 0.101 248.7)
-
Step 400
400 (this color)
#239FFF
oklch(68.6% 0.174 248.3)
-
Step 500
500
#008EEA
oklch(63.2% 0.17 248)
-
Step 600
600
#0077C6
oklch(55.6% 0.15 248.2)
-
Step 700
700
#0064A8
oklch(49.2% 0.133 248.3)
-
Step 800
800
#00528A
oklch(42.8% 0.115 247.8)
-
Step 900
900
#004475
oklch(37.8% 0.103 248.3)
-
Step 950
950
#002848
oklch(27% 0.073 248.1)
#239FFF 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) | #70A5FF | 0.059 |
| Deuteranopia (no green cones) | #4E91FD | 0.040 |
| Tritanopia (no blue cones) | #00B6C3 | 0.124 |
| Achromatopsia (no color) | #9A9A9A | 0.174 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #239FFF
#239FFF
oklch(68.6% 0.174 248.3)
- #D58500
#D58500
oklch(68.5% 0.15 68.2)
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 #239FFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.034
- Dodger Blue #1E90FF ΔE 0.040
- Cornflower Blue #6495ED ΔE 0.050
- Dark Sky Blue #448EE4 ΔE 0.054
- Soft Blue #6488EA ΔE 0.070
- Deep Sky Blue #00BFFF ΔE 0.087
- Periwinkle Blue #8F99FB ΔE 0.091
- Water Blue #0E87CC ΔE 0.094
Use #239FFF 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.