#009BDF
Closest named color: Chefchaouen Blue (#4895EF). oklch(65.5% 0.146 238.4), rgb(0, 155, 223).
Aa
Black text reads best on this color (6.75:1).
About this color
#009BDF is a medium-light, vivid blue. In OKLCH its lightness is 66%, its chroma 0.146 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.043 away. Black text reads best on it, at 6.75:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | vivid (0.146) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 6.75:1 |
| White text | 3.10:1 |
Values
| HEX | #009BDF |
| RGB | rgb(0, 155, 223) |
| HSL | hsl(198, 100%, 44%) |
| OKLCH | oklch(65.5% 0.146 238.4) |
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 #009BDF | 3.10:1 | AA large text | Lc -62.8 | Content text, not long reading |
| Black text on #009BDF | 6.75:1 | AA | Lc 46.7 | Large or bold text, headings |
| #009BDF text on white | 3.10:1 | AA large text | Lc 57.4 | Large or bold text, headings |
| #009BDF text on black | 6.75:1 | AA | Lc -44.4 | 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
#F0F7FB
oklch(97.2% 0.009 232.4)
-
Step 100
100
#DEECF6
oklch(93.6% 0.02 238.7)
-
Step 200
200
#C2DEF1
oklch(88.6% 0.04 237.6)
-
Step 300
300
#95C8EA
oklch(80.9% 0.072 238)
-
Step 400
400
#54AAE0
oklch(70.7% 0.115 238.9)
-
Step 500
500 (this color)
#009BDF
oklch(65.5% 0.146 238.4)
-
Step 600
600
#007CB3
oklch(55.7% 0.124 238.2)
-
Step 700
700
#006897
oklch(49.1% 0.109 238.1)
-
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
#002A40
oklch(27% 0.06 237.8)
#009BDF 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) | #7A9CE2 | 0.078 |
| Deuteranopia (no green cones) | #5F8ADE | 0.062 |
| Tritanopia (no blue cones) | #00ACB3 | 0.093 |
| Achromatopsia (no color) | #929292 | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #009BDF
#009BDF
oklch(65.5% 0.146 238.4)
- #D1771D
#D1771D
oklch(65.6% 0.146 58.7)
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 #009BDF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.043
- Dark Sky Blue #448EE4 ΔE 0.043
- Water Blue #0E87CC ΔE 0.058
- Cornflower Blue #6495ED ΔE 0.061
- Dodger Blue #1E90FF ΔE 0.061
- Faded Blue #658CBB ΔE 0.074
- Soft Blue #6488EA ΔE 0.074
- Blue NCS #118AB2 ΔE 0.075
Use #009BDF 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.