#18A0DF
Closest named color: Chefchaouen Blue (#4895EF). oklch(66.9% 0.14 236.6), rgb(24, 160, 223).
Aa
Black text reads best on this color (7.13:1).
About this color
#18A0DF is a medium-light, vivid blue. In OKLCH its lightness is 67%, its chroma 0.140 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.047 away. Black text reads best on it, at 7.13:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | vivid (0.140) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.13:1 |
| White text | 2.94:1 |
Values
| HEX | #18A0DF |
| RGB | rgb(24, 160, 223) |
| HSL | hsl(199, 81%, 48%) |
| OKLCH | oklch(66.9% 0.14 236.6) |
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 #18A0DF | 2.94:1 | Fails | Lc -60.7 | Content text, not long reading |
| Black text on #18A0DF | 7.13:1 | AAA | Lc 48.7 | Large or bold text, headings |
| #18A0DF text on white | 2.94:1 | Fails | Lc 55.4 | Large or bold text, headings |
| #18A0DF text on black | 7.13:1 | AAA | Lc -46.4 | 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 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
#C2DEEF
oklch(88.5% 0.038 234.5)
-
Step 300
300
#96C8E8
oklch(80.9% 0.069 236.8)
-
Step 400
400
#55ABDC
oklch(70.8% 0.11 236.2)
-
Step 500
500 (this color)
#18A0DF
oklch(66.9% 0.14 236.6)
-
Step 600
600
#007CB0
oklch(55.5% 0.121 236.7)
-
Step 700
700
#006895
oklch(49% 0.107 237)
-
Step 800
800
#00557B
oklch(42.6% 0.093 237.2)
-
Step 900
900
#004767
oklch(37.7% 0.082 236.6)
-
Step 950
950
#012A3F
oklch(27% 0.058 237)
#18A0DF 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) | #81A0E2 | 0.080 |
| Deuteranopia (no green cones) | #688FDE | 0.064 |
| Tritanopia (no blue cones) | #00B0B6 | 0.087 |
| Achromatopsia (no color) | #969696 | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18A0DF
#18A0DF
oklch(66.9% 0.14 236.6)
- #D47B30
#D47B30
oklch(66.8% 0.14 56.6)
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 #18A0DF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.047
- Dark Sky Blue #448EE4 ΔE 0.053
- Cornflower Blue #6495ED ΔE 0.061
- Dodger Blue #1E90FF ΔE 0.071
- Turquoise Blue #06B1C4 ΔE 0.072
- Water Blue #0E87CC ΔE 0.072
- Faded Blue #658CBB ΔE 0.075
- Soft Blue #6488EA ΔE 0.081
Use #18A0DF 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.