#018DF0
Closest named color: Dodger Blue (#1E90FF). oklch(63.3% 0.178 249.8), rgb(1, 141, 240).
Aa
Black text reads best on this color (6.06:1).
About this color
#018DF0 is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.178 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Dodger Blue (#1E90FF), ΔE 0.025 away. Black text reads best on it, at 6.06:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.178) |
| Temperature | cool |
| Nearest name | Dodger Blue (#1E90FF) |
| Black text | 6.06:1 |
| White text | 3.45:1 |
Values
| HEX | #018DF0 |
| RGB | rgb(1, 141, 240) |
| HSL | hsl(205, 99%, 47%) |
| OKLCH | oklch(63.3% 0.178 249.8) |
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 #018DF0 | 3.45:1 | AA large text | Lc -66.8 | Content text, not long reading |
| Black text on #018DF0 | 6.06:1 | AA | Lc 42.7 | Non-text elements, placeholder text |
| #018DF0 text on white | 3.45:1 | AA large text | Lc 61.4 | Content text, not long reading |
| #018DF0 text on black | 6.06:1 | AA | Lc -40.3 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DEECFB
oklch(93.7% 0.025 250)
-
Step 200
200
#C2DCF9
oklch(88.5% 0.049 251.2)
-
Step 300
300
#95C5F7
oklch(80.8% 0.087 250)
-
Step 400
400
#55A6F4
oklch(70.8% 0.14 249.6)
-
Step 500
500 (this color)
#018DF0
oklch(63.3% 0.178 249.8)
-
Step 600
600
#0076CA
oklch(55.7% 0.156 249.7)
-
Step 700
700
#0063AB
oklch(49.2% 0.138 249.7)
-
Step 800
800
#00518D
oklch(42.7% 0.12 249.5)
-
Step 900
900
#004377
oklch(37.7% 0.106 249.9)
-
Step 950
950
#022748
oklch(26.8% 0.073 250.2)
#018DF0 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) | #5A94F4 | 0.054 |
| Deuteranopia (no green cones) | #3181EE | 0.032 |
| Tritanopia (no blue cones) | #00A5B3 | 0.128 |
| Achromatopsia (no color) | #8A8A8A | 0.178 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #018DF0
#018DF0
oklch(63.3% 0.178 249.8)
- #BE7900
#BE7900
oklch(63.4% 0.137 70.2)
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 #018DF0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dodger Blue #1E90FF ΔE 0.025
- Dark Sky Blue #448EE4 ΔE 0.032
- Chefchaouen Blue #4895EF ΔE 0.041
- Clear Blue #247AFD ΔE 0.054
- Water Blue #0E87CC ΔE 0.055
- Soft Blue #6488EA ΔE 0.057
- Cornflower Blue #6495ED ΔE 0.064
- Cornflower #6A79F7 ΔE 0.079
Use #018DF0 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.