#187B9A
Closest named color: Ocean (#017B92). oklch(54.4% 0.097 225), rgb(24, 123, 154).
Aa
White text reads best on this color (4.84:1).
About this color
#187B9A is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 54%, its chroma 0.097 and its hue 225°. Its hue sits on the cool side of the wheel. The nearest named color is Ocean (#017B92), ΔE 0.015 away. White text reads best on it, at 4.84:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Ocean (#017B92) |
| Black text | 4.33:1 |
| White text | 4.84:1 |
Values
| HEX | #187B9A |
| RGB | rgb(24, 123, 154) |
| HSL | hsl(194, 73%, 35%) |
| OKLCH | oklch(54.4% 0.097 225) |
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 #187B9A | 4.84:1 | AA | Lc -78.6 | Fine for body text |
| Black text on #187B9A | 4.33:1 | AA large text | Lc 30.9 | Non-text elements, placeholder text |
| #187B9A text on white | 4.84:1 | AA | Lc 73.1 | Content text, not long reading |
| #187B9A 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
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E1ECF0
oklch(93.6% 0.013 221.4)
-
Step 200
200
#C9DDE5
oklch(88.5% 0.024 223.7)
-
Step 300
300
#A3C7D6
oklch(80.8% 0.044 225.1)
-
Step 400
400
#70AAC1
oklch(70.7% 0.069 225)
-
Step 500
500
#4595B2
oklch(63.2% 0.089 224.7)
-
Step 600
600 (this color)
#187B9A
oklch(54.4% 0.097 225)
-
Step 700
700
#0C6B87
oklch(49.2% 0.09 224.9)
-
Step 800
800
#11576E
oklch(42.7% 0.075 225.6)
-
Step 900
900
#184859
oklch(37.7% 0.058 225.1)
-
Step 950
950
#102A34
oklch(27% 0.037 225.8)
#187B9A 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) | #6A789C | 0.074 |
| Deuteranopia (no green cones) | #596C9A | 0.065 |
| Tritanopia (no blue cones) | #008485 | 0.050 |
| Achromatopsia (no color) | #727272 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #187B9A
#187B9A
oklch(54.4% 0.097 225)
- #9E5C3E
#9E5C3E
oklch(54.4% 0.097 44.7)
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 #187B9A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Ocean #017B92 ΔE 0.015
- Sea Blue #047495 ΔE 0.023
- Cerulean #457B9D ΔE 0.031
- Ocean Blue #03719C ΔE 0.033
- Nice Blue #107AB0 ΔE 0.036
- Muted Blue #3B719F ΔE 0.037
- Dull Blue #49759C ΔE 0.037
- Teal Blue #01889F ΔE 0.038
Use #187B9A 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.