#009ADF
Closest named color: Dark Sky Blue (#448EE4). oklch(65.3% 0.147 239), rgb(0, 154, 223).
Aa
Black text reads best on this color (6.68:1).
About this color
#009ADF is a medium-light, vivid blue. In OKLCH its lightness is 65%, its chroma 0.147 and its hue 239°. Its hue sits on the cool side of the wheel. The nearest named color is Dark Sky Blue (#448EE4), ΔE 0.041 away. Black text reads best on it, at 6.68:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Dark Sky Blue (#448EE4) |
| Black text | 6.68:1 |
| White text | 3.14:1 |
Values
| HEX | #009ADF |
| RGB | rgb(0, 154, 223) |
| HSL | hsl(199, 100%, 44%) |
| OKLCH | oklch(65.3% 0.147 239) |
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 #009ADF | 3.14:1 | AA large text | Lc -63.2 | Content text, not long reading |
| Black text on #009ADF | 6.68:1 | AA | Lc 46.3 | Large or bold text, headings |
| #009ADF text on white | 3.14:1 | AA large text | Lc 57.8 | Large or bold text, headings |
| #009ADF text on black | 6.68:1 | AA | Lc -44.0 | 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
#96C8EA
oklch(81% 0.071 238.5)
-
Step 400
400
#54AAE0
oklch(70.7% 0.115 238.9)
-
Step 500
500 (this color)
#009ADF
oklch(65.3% 0.147 239)
-
Step 600
600
#007BB4
oklch(55.5% 0.126 239.3)
-
Step 700
700
#006898
oklch(49.2% 0.11 238.7)
-
Step 800
800
#00557D
oklch(42.7% 0.096 238.5)
-
Step 900
900
#004769
oklch(37.8% 0.084 238.3)
-
Step 950
950
#002A41
oklch(27.1% 0.061 239)
#009ADF 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) | #789BE2 | 0.076 |
| Deuteranopia (no green cones) | #5D8ADE | 0.059 |
| Tritanopia (no blue cones) | #00ABB2 | 0.095 |
| Achromatopsia (no color) | #919191 | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #009ADF
#009ADF
oklch(65.3% 0.147 239)
- #D07619
#D07619
oklch(65.3% 0.147 59)
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 #009ADF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Sky Blue #448EE4 ΔE 0.041
- Chefchaouen Blue #4895EF ΔE 0.042
- Water Blue #0E87CC ΔE 0.055
- Dodger Blue #1E90FF ΔE 0.060
- Cornflower Blue #6495ED ΔE 0.060
- Soft Blue #6488EA ΔE 0.073
- Faded Blue #658CBB ΔE 0.073
- Blue NCS #118AB2 ΔE 0.074
Use #009ADF 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.