#187D8A
Closest named color: Ocean (#017B92). oklch(54.2% 0.087 208.4), rgb(24, 125, 138).
Aa
White text reads best on this color (4.83:1).
About this color
#187D8A is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 54%, its chroma 0.087 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.017 away. White text reads best on it, at 4.83:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.087) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.33:1 |
| White text | 4.83:1 |
Values
| HEX | #187D8A |
| RGB | rgb(24, 125, 138) |
| HSL | hsl(187, 70%, 32%) |
| OKLCH | oklch(54.2% 0.087 208.4) |
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 #187D8A | 4.83:1 | AA | Lc -78.6 | Fine for body text |
| Black text on #187D8A | 4.33:1 | AA large text | Lc 30.9 | Non-text elements, placeholder text |
| #187D8A text on white | 4.83:1 | AA | Lc 73.2 | Content text, not long reading |
| #187D8A text on black | 4.33:1 | AA large text | Lc -28.5 | Dividers and decoration only |
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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E2ECEE
oklch(93.6% 0.011 211)
-
Step 200
200
#C9DDE1
oklch(88.4% 0.022 211)
-
Step 300
300
#A4C8CE
oklch(80.9% 0.039 208.8)
-
Step 400
400
#71ACB5
oklch(70.7% 0.062 208)
-
Step 500
500
#4697A3
oklch(63.1% 0.08 208.3)
-
Step 600
600 (this color)
#187D8A
oklch(54.2% 0.087 208.4)
-
Step 700
700
#0D6D79
oklch(49.1% 0.081 208.6)
-
Step 800
800
#125962
oklch(42.7% 0.067 207.8)
-
Step 900
900
#194950
oklch(37.6% 0.052 208.5)
-
Step 950
950
#102B2F
oklch(27% 0.033 208.2)
#187D8A 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) | #71788B | 0.084 |
| Deuteranopia (no green cones) | #626D8A | 0.076 |
| Tritanopia (no blue cones) | #008381 | 0.027 |
| Achromatopsia (no color) | #727272 | 0.088 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #187D8A
#187D8A
oklch(54.2% 0.087 208.4)
- #9C5B52
#9C5B52
oklch(54.3% 0.087 28.7)
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 #187D8A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.017
- Teal #008080 ΔE 0.022
- Deep Aqua #08787F ΔE 0.022
- Bluegreen #017A79 ΔE 0.029
- Sea Blue #047495 ΔE 0.038
- Teal Blue #01889F ΔE 0.040
- Dark Cyan #008B8B ΔE 0.042
- Deep Turquoise #017374 ΔE 0.043
Use #187D8A 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.