#018CF0
Closest named color: Dodger Blue (#1E90FF). oklch(63.1% 0.179 250.2), rgb(1, 140, 240).
Aa
Black text reads best on this color (6.01:1).
About this color
#018CF0 is a medium-light, vivid blue. In OKLCH its lightness is 63%, its chroma 0.179 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Dodger Blue (#1E90FF), ΔE 0.026 away. Black text reads best on it, at 6.01:1.
| Hue family | Blues |
| Lightness | medium-light (63%) |
| Chroma | vivid (0.179) |
| Temperature | cool |
| Nearest name | Dodger Blue (#1E90FF) |
| Black text | 6.01:1 |
| White text | 3.49:1 |
Values
| HEX | #018CF0 |
| RGB | rgb(1, 140, 240) |
| HSL | hsl(205, 99%, 47%) |
| OKLCH | oklch(63.1% 0.179 250.2) |
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 #018CF0 | 3.49:1 | AA large text | Lc -67.2 | Content text, not long reading |
| Black text on #018CF0 | 6.01:1 | AA | Lc 42.3 | Non-text elements, placeholder text |
| #018CF0 text on white | 3.49:1 | AA large text | Lc 61.7 | Content text, not long reading |
| #018CF0 text on black | 6.01:1 | AA | Lc -40.0 | 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
#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
#95C5F8
oklch(80.8% 0.089 250.5)
-
Step 400
400
#55A5F4
oklch(70.6% 0.14 250.2)
-
Step 500
500 (this color)
#018CF0
oklch(63.1% 0.179 250.2)
-
Step 600
600
#0075CB
oklch(55.5% 0.159 250.4)
-
Step 700
700
#0063AC
oklch(49.2% 0.139 250)
-
Step 800
800
#00518E
oklch(42.8% 0.121 249.9)
-
Step 900
900
#004378
oklch(37.8% 0.108 250.3)
-
Step 950
950
#022749
oklch(26.9% 0.075 250.8)
#018CF0 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) | #5893F4 | 0.052 |
| Deuteranopia (no green cones) | #2E81EE | 0.029 |
| Tritanopia (no blue cones) | #00A4B2 | 0.129 |
| Achromatopsia (no color) | #898989 | 0.179 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #018CF0
#018CF0
oklch(63.1% 0.179 250.2)
- #BD7800
#BD7800
oklch(63.1% 0.137 69.9)
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 #018CF0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dodger Blue #1E90FF ΔE 0.026
- Dark Sky Blue #448EE4 ΔE 0.033
- Chefchaouen Blue #4895EF ΔE 0.043
- Clear Blue #247AFD ΔE 0.052
- Water Blue #0E87CC ΔE 0.054
- Soft Blue #6488EA ΔE 0.057
- Cornflower Blue #6495ED ΔE 0.066
- Cerulean Blue #056EEE ΔE 0.078
Use #018CF0 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.