#159EF9
Closest named color: Chefchaouen Blue (#4895EF). oklch(67.8% 0.17 246.2), rgb(21, 158, 249).
Aa
Black text reads best on this color (7.29:1).
About this color
#159EF9 is a medium-light, vivid blue. In OKLCH its lightness is 68%, its chroma 0.170 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.031 away. Black text reads best on it, at 7.29:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.170) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.29:1 |
| White text | 2.88:1 |
Values
| HEX | #159EF9 |
| RGB | rgb(21, 158, 249) |
| HSL | hsl(204, 95%, 53%) |
| OKLCH | oklch(67.8% 0.17 246.2) |
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 #159EF9 | 2.88:1 | Fails | Lc -59.7 | Large or bold text, headings |
| Black text on #159EF9 | 7.29:1 | AAA | Lc 49.6 | Large or bold text, headings |
| #159EF9 text on white | 2.88:1 | Fails | Lc 54.4 | Large or bold text, headings |
| #159EF9 text on black | 7.29:1 | AAA | Lc -47.4 | 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
#BADEFF
oklch(88.6% 0.059 246.2)
-
Step 300
300
#88C7FF
oklch(80.8% 0.103 246.3)
-
Step 400
400 (this color)
#159EF9
oklch(67.8% 0.17 246.2)
-
Step 500
500
#008FE5
oklch(63.1% 0.163 246.3)
-
Step 600
600
#0078C1
oklch(55.5% 0.143 246.2)
-
Step 700
700
#0065A4
oklch(49.2% 0.127 246.3)
-
Step 800
800
#005287
oklch(42.6% 0.111 246.5)
-
Step 900
900
#004572
oklch(37.9% 0.097 246)
-
Step 950
950
#002846
oklch(26.9% 0.07 246.6)
#159EF9 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) | #72A2FD | 0.065 |
| Deuteranopia (no green cones) | #5090F7 | 0.043 |
| Tritanopia (no blue cones) | #00B4C0 | 0.118 |
| Achromatopsia (no color) | #989898 | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #159EF9
#159EF9
oklch(67.8% 0.17 246.2)
- #D58200
#D58200
oklch(67.9% 0.151 66.4)
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 #159EF9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.031
- Dodger Blue #1E90FF ΔE 0.039
- Dark Sky Blue #448EE4 ΔE 0.048
- Cornflower Blue #6495ED ΔE 0.050
- Soft Blue #6488EA ΔE 0.069
- Water Blue #0E87CC ΔE 0.085
- Deep Sky Blue #00BFFF ΔE 0.089
- Clear Blue #247AFD ΔE 0.094
Use #159EF9 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.