#129AE0
Closest named color: Dark Sky Blue (#448EE4). oklch(65.5% 0.146 240), rgb(18, 154, 224).
Aa
Black text reads best on this color (6.72:1).
About this color
#129AE0 is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.146 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.039 away. Black text reads best on it, at 6.72:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.72:1 |
| White text | 3.12:1 |
Values
| HEX | #129AE0 |
| RGB | rgb(18, 154, 224) |
| HSL | hsl(200, 85%, 47%) |
| OKLCH | oklch(65.5% 0.146 240) |
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 #129AE0 | 3.12:1 | AA large text | Lc -63.0 | Content text, not long reading |
| Black text on #129AE0 | 6.72:1 | AA | Lc 46.4 | Large or bold text, headings |
| #129AE0 text on white | 3.12:1 | AA large text | Lc 57.7 | Large or bold text, headings |
| #129AE0 text on black | 6.72:1 | AA | Lc -44.1 | 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
#F0F6FB
oklch(97% 0.009 242.8)
-
Step 100
100
#DEECF7
oklch(93.6% 0.021 241.4)
-
Step 200
200
#C2DDF1
oklch(88.4% 0.04 240)
-
Step 300
300
#97C7EB
oklch(80.8% 0.072 241.2)
-
Step 400
400
#56AAE1
oklch(70.8% 0.115 239.8)
-
Step 500
500 (this color)
#129AE0
oklch(65.5% 0.146 240)
-
Step 600
600
#007BB6
oklch(55.6% 0.128 240.2)
-
Step 700
700
#00679A
oklch(49.1% 0.113 240.5)
-
Step 800
800
#00557F
oklch(42.8% 0.098 239.8)
-
Step 900
900
#00466A
oklch(37.6% 0.086 240.1)
-
Step 950
950
#012A41
oklch(27.1% 0.061 239.4)
#129AE0 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) | #789BE3 | 0.073 |
| Deuteranopia (no green cones) | #5D8ADF | 0.057 |
| Tritanopia (no blue cones) | #00ACB3 | 0.097 |
| Achromatopsia (no color) | #929292 | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #129AE0
#129AE0
oklch(65.5% 0.146 240)
- #D07718
#D07718
oklch(65.4% 0.147 59.7)
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 #129AE0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.039
- Chefchaouen Blue #4895EF ΔE 0.039
- Water Blue #0E87CC ΔE 0.057
- Cornflower Blue #6495ED ΔE 0.057
- Dodger Blue #1E90FF ΔE 0.058
- Soft Blue #6488EA ΔE 0.070
- Faded Blue #658CBB ΔE 0.072
- Cool Blue #4984B8 ΔE 0.075
Use #129AE0 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.