#129EE9
Closest named color: Chefchaouen Blue (#4895EF). oklch(66.9% 0.153 241.2), rgb(18, 158, 233).
Aa
Black text reads best on this color (7.09:1).
About this color
#129EE9 is a medium-light, vivid blue. In OKLCH its lightness is 67%, its chroma 0.153 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.035 away. Black text reads best on it, at 7.09:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.153) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.09:1 |
| White text | 2.96:1 |
Values
| HEX | #129EE9 |
| RGB | rgb(18, 158, 233) |
| HSL | hsl(201, 86%, 49%) |
| OKLCH | oklch(66.9% 0.153 241.2) |
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 #129EE9 | 2.96:1 | Fails | Lc -60.9 | Content text, not long reading |
| Black text on #129EE9 | 7.09:1 | AAA | Lc 48.5 | Large or bold text, headings |
| #129EE9 text on white | 2.96:1 | Fails | Lc 55.5 | Large or bold text, headings |
| #129EE9 text on black | 7.09:1 | AAA | Lc -46.3 | 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 500.
-
Step 50
50
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DEECF7
oklch(93.6% 0.021 241.4)
-
Step 200
200
#C2DDF3
oklch(88.5% 0.042 242.7)
-
Step 300
300
#95C7ED
oklch(80.8% 0.075 241.6)
-
Step 400
400
#54A9E4
oklch(70.7% 0.119 241.5)
-
Step 500
500 (this color)
#129EE9
oklch(66.9% 0.153 241.2)
-
Step 600
600
#007BB8
oklch(55.7% 0.13 241.1)
-
Step 700
700
#00679B
oklch(49.1% 0.115 241)
-
Step 800
800
#005480
oklch(42.6% 0.1 241.3)
-
Step 900
900
#00466C
oklch(37.7% 0.089 241.5)
-
Step 950
950
#002942
oklch(26.9% 0.063 241.6)
#129EE9 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) | #7AA0EC | 0.074 |
| Deuteranopia (no green cones) | #5E8EE8 | 0.056 |
| Tritanopia (no blue cones) | #00B1B9 | 0.102 |
| Achromatopsia (no color) | #969696 | 0.153 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #129EE9
#129EE9
oklch(66.9% 0.153 241.2)
- #D67B0A
#D67B0A
oklch(66.9% 0.153 61.3)
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 #129EE9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.035
- Dark Sky Blue #448EE4 ΔE 0.044
- Cornflower Blue #6495ED ΔE 0.053
- Dodger Blue #1E90FF ΔE 0.054
- Water Blue #0E87CC ΔE 0.071
- Soft Blue #6488EA ΔE 0.072
- Faded Blue #658CBB ΔE 0.083
- Turquoise Blue #06B1C4 ΔE 0.088
Use #129EE9 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.