#0187A8
Closest named color: Teal Blue (#01889F). oklch(57.9% 0.108 223), rgb(1, 135, 168).
Aa
Black text reads best on this color (5.03:1).
About this color
#0187A8 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 58%, its chroma 0.108 and its hue 223°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Blue (#01889F), ΔE 0.015 away. Black text reads best on it, at 5.03:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (58%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Teal Blue (#01889F) |
| Black text | 5.03:1 |
| White text | 4.17:1 |
Values
| HEX | #0187A8 |
| RGB | rgb(1, 135, 168) |
| HSL | hsl(192, 99%, 33%) |
| OKLCH | oklch(57.9% 0.108 223) |
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 #0187A8 | 4.17:1 | AA large text | Lc -73.6 | Content text, not long reading |
| Black text on #0187A8 | 5.03:1 | AA | Lc 35.9 | Non-text elements, placeholder text |
| #0187A8 text on white | 4.17:1 | AA large text | Lc 68.1 | Content text, not long reading |
| #0187A8 text on black | 5.03:1 | AA | Lc -33.5 | 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 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
#C7DDE6
oklch(88.4% 0.027 224.3)
-
Step 300
300
#9FC8D8
oklch(80.9% 0.049 223.7)
-
Step 400
400
#68ACC4
oklch(70.8% 0.077 222.7)
-
Step 500
500
#3696B5
oklch(63% 0.099 223.3)
-
Step 600
600 (this color)
#0187A8
oklch(57.9% 0.108 223)
-
Step 700
700
#006B86
oklch(49% 0.091 223.1)
-
Step 800
800
#00586F
oklch(42.7% 0.08 223.4)
-
Step 900
900
#0D495A
oklch(37.8% 0.064 222)
-
Step 950
950
#0B2B35
oklch(27.1% 0.041 222.2)
#0187A8 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) | #7484AA | 0.085 |
| Deuteranopia (no green cones) | #6176A8 | 0.074 |
| Tritanopia (no blue cones) | #009192 | 0.052 |
| Achromatopsia (no color) | #7C7C7C | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0187A8
#0187A8
oklch(57.9% 0.108 223)
- #AE6343
#AE6343
oklch(57.8% 0.107 43.3)
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 #0187A8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Blue #01889F ΔE 0.015
- Blue NCS #118AB2 ΔE 0.017
- Cerulean #457B9D ΔE 0.042
- Steel Blue #4682B4 ΔE 0.043
- Nice Blue #107AB0 ΔE 0.043
- Ocean #017B92 ΔE 0.044
- Cool Blue #4984B8 ΔE 0.047
- Stormy Blue #507B9C ΔE 0.050
Use #0187A8 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.