#018BB0
Closest named color: Blue NCS (#118AB2). oklch(59.2% 0.112 225.1), rgb(1, 139, 176).
Aa
Black text reads best on this color (5.32:1).
About this color
#018BB0 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.112 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Blue NCS (#118AB2), ΔE 0.006 away. Black text reads best on it, at 5.32:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.112) |
| Temperature | cool |
| Nearest name | Blue NCS (#118AB2) |
| Black text | 5.32:1 |
| White text | 3.94:1 |
Values
| HEX | #018BB0 |
| RGB | rgb(1, 139, 176) |
| HSL | hsl(193, 99%, 35%) |
| OKLCH | oklch(59.2% 0.112 225.1) |
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 #018BB0 | 3.94:1 | AA large text | Lc -71.7 | Content text, not long reading |
| Black text on #018BB0 | 5.32:1 | AA | Lc 37.9 | Non-text elements, placeholder text |
| #018BB0 text on white | 3.94:1 | AA large text | Lc 66.2 | Content text, not long reading |
| #018BB0 text on black | 5.32:1 | AA | Lc -35.4 | 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 600.
-
Step 50
50
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E0ECF1
oklch(93.6% 0.015 224.5)
-
Step 200
200
#C6DEE7
oklch(88.6% 0.028 222.3)
-
Step 300
300
#9EC8D9
oklch(80.8% 0.05 224.6)
-
Step 400
400
#66ABC7
oklch(70.6% 0.081 226.1)
-
Step 500
500
#3296B8
oklch(63.1% 0.103 225)
-
Step 600
600 (this color)
#018BB0
oklch(59.2% 0.112 225.1)
-
Step 700
700
#006B88
oklch(49.1% 0.093 224.9)
-
Step 800
800
#005870
oklch(42.8% 0.081 224.4)
-
Step 900
900
#09495C
oklch(37.8% 0.067 224)
-
Step 950
950
#0A2B36
oklch(27.1% 0.042 224)
#018BB0 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) | #7788B2 | 0.085 |
| Deuteranopia (no green cones) | #627AB0 | 0.073 |
| Tritanopia (no blue cones) | #009697 | 0.058 |
| Achromatopsia (no color) | #808080 | 0.112 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #018BB0
#018BB0
oklch(59.2% 0.112 225.1)
- #B46642
#B46642
oklch(59.1% 0.112 44.8)
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 #018BB0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue NCS #118AB2 ΔE 0.006
- Teal Blue #01889F ΔE 0.026
- Steel Blue #4682B4 ΔE 0.040
- Cool Blue #4984B8 ΔE 0.042
- Off Blue #5684AE ΔE 0.048
- Water Blue #0E87CC ΔE 0.048
- Nice Blue #107AB0 ΔE 0.050
- Dusty Blue #5A86AD ΔE 0.050
Use #018BB0 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.