#018DC7
Closest named color: Water Blue (#0E87CC). oklch(60.9% 0.132 236.5), rgb(1, 141, 199).
Aa
Black text reads best on this color (5.63:1).
About this color
#018DC7 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.132 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Water Blue (#0E87CC), ΔE 0.020 away. Black text reads best on it, at 5.63:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.132) |
| Temperature | cool |
| Nearest name | Water Blue (#0E87CC) |
| Black text | 5.63:1 |
| White text | 3.72:1 |
Values
| HEX | #018DC7 |
| RGB | rgb(1, 141, 199) |
| HSL | hsl(198, 99%, 39%) |
| OKLCH | oklch(60.9% 0.132 236.5) |
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 #018DC7 | 3.72:1 | AA large text | Lc -69.7 | Content text, not long reading |
| Black text on #018DC7 | 5.63:1 | AA | Lc 39.9 | Non-text elements, placeholder text |
| #018DC7 text on white | 3.72:1 | AA large text | Lc 64.2 | Content text, not long reading |
| #018DC7 text on black | 5.63:1 | AA | Lc -37.5 | 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
#DFECF5
oklch(93.6% 0.018 237.8)
-
Step 200
200
#C4DDEE
oklch(88.4% 0.036 237.6)
-
Step 300
300
#99C8E5
oklch(81% 0.064 235.7)
-
Step 400
400
#5BAAD9
oklch(70.7% 0.104 236.9)
-
Step 500
500 (this color)
#018DC7
oklch(60.9% 0.132 236.5)
-
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
#042A3D
oklch(27% 0.054 235.8)
#018DC7 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) | #708DCA | 0.074 |
| Deuteranopia (no green cones) | #597DC6 | 0.061 |
| Tritanopia (no blue cones) | #009CA1 | 0.083 |
| Achromatopsia (no color) | #848484 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #018DC7
#018DC7
oklch(60.9% 0.132 236.5)
- #BD6B24
#BD6B24
oklch(60.9% 0.132 56.5)
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 #018DC7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Water Blue #0E87CC ΔE 0.020
- Blue NCS #118AB2 ΔE 0.032
- Cool Blue #4984B8 ΔE 0.040
- Steel Blue #4682B4 ΔE 0.043
- Off Blue #5684AE ΔE 0.055
- Dark Sky Blue #448EE4 ΔE 0.056
- Windows Blue #3778BF ΔE 0.058
- Dusty Blue #5A86AD ΔE 0.058
Use #018DC7 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.