#187FA5
Closest named color: Nice Blue (#107AB0). oklch(55.9% 0.104 229.4), rgb(24, 127, 165).
Aa
Black text reads best on this color (4.61:1).
About this color
#187FA5 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 56%, its chroma 0.104 and its hue 229°. Its hue sits on the cool side of the wheel. The nearest named color is Nice Blue (#107AB0), ΔE 0.026 away. Black text reads best on it, at 4.61:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Nice Blue (#107AB0) |
| Black text | 4.61:1 |
| White text | 4.54:1 |
Values
| HEX | #187FA5 |
| RGB | rgb(24, 127, 165) |
| HSL | hsl(196, 75%, 37%) |
| OKLCH | oklch(55.9% 0.104 229.4) |
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 #187FA5 | 4.54:1 | AA | Lc -76.6 | Fine for body text |
| Black text on #187FA5 | 4.61:1 | AA | Lc 32.9 | Non-text elements, placeholder text |
| #187FA5 text on white | 4.54:1 | AA | Lc 71.1 | Content text, not long reading |
| #187FA5 text on black | 4.61:1 | AA | Lc -30.5 | 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
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C8DDE7
oklch(88.5% 0.026 227.9)
-
Step 300
300
#A2C7D9
oklch(80.9% 0.047 229)
-
Step 400
400
#6DAAC6
oklch(70.7% 0.075 228.8)
-
Step 500
500
#4194B8
oklch(63% 0.096 229.6)
-
Step 600
600 (this color)
#187FA5
oklch(55.9% 0.104 229.4)
-
Step 700
700
#016A8C
oklch(49% 0.097 229.2)
-
Step 800
800
#0B5772
oklch(42.8% 0.08 228.8)
-
Step 900
900
#16485C
oklch(37.8% 0.062 228.6)
-
Step 950
950
#0F2A36
oklch(27% 0.04 229.8)
#187FA5 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) | #6B7DA7 | 0.072 |
| Deuteranopia (no green cones) | #5970A4 | 0.062 |
| Tritanopia (no blue cones) | #008A8C | 0.059 |
| Achromatopsia (no color) | #767676 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #187FA5
#187FA5
oklch(55.9% 0.104 229.4)
- #A56039
#A56039
oklch(55.9% 0.105 48.9)
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 #187FA5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Nice Blue #107AB0 ΔE 0.026
- Cerulean #457B9D ΔE 0.029
- Teal Blue #01889F ΔE 0.031
- Ocean #017B92 ΔE 0.032
- Blue NCS #118AB2 ΔE 0.034
- Sea Blue #047495 ΔE 0.039
- Dull Blue #49759C ΔE 0.039
- Stormy Blue #507B9C ΔE 0.040
Use #187FA5 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.