#187FA3
Closest named color: Nice Blue (#107AB0). oklch(55.8% 0.103 228), rgb(24, 127, 163).
Aa
Black text reads best on this color (4.60:1).
About this color
#187FA3 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 56%, its chroma 0.103 and its hue 228°. Its hue sits on the cool side of the wheel. The nearest named color is Nice Blue (#107AB0), ΔE 0.028 away. Black text reads best on it, at 4.60:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (56%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Nice Blue (#107AB0) |
| Black text | 4.60:1 |
| White text | 4.56:1 |
Values
| HEX | #187FA3 |
| RGB | rgb(24, 127, 163) |
| HSL | hsl(196, 74%, 37%) |
| OKLCH | oklch(55.8% 0.103 228) |
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 #187FA3 | 4.56:1 | AA | Lc -76.7 | Fine for body text |
| Black text on #187FA3 | 4.60:1 | AA | Lc 32.8 | Non-text elements, placeholder text |
| #187FA3 text on white | 4.56:1 | AA | Lc 71.2 | Content text, not long reading |
| #187FA3 text on black | 4.60:1 | AA | Lc -30.4 | 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
#E1ECF1
oklch(93.6% 0.014 226.6)
-
Step 200
200
#C9DDE7
oklch(88.6% 0.025 229.2)
-
Step 300
300
#A2C7D8
oklch(80.8% 0.046 227.5)
-
Step 400
400
#6EAAC5
oklch(70.7% 0.074 228.2)
-
Step 500
500
#4294B6
oklch(63% 0.094 228.3)
-
Step 600
600 (this color)
#187FA3
oklch(55.8% 0.103 228)
-
Step 700
700
#016A8B
oklch(49% 0.096 228.4)
-
Step 800
800
#0C5771
oklch(42.8% 0.079 228)
-
Step 900
900
#16485B
oklch(37.8% 0.061 227.3)
-
Step 950
950
#0F2A35
oklch(27% 0.038 227.5)
#187FA3 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) | #6C7DA5 | 0.074 |
| Deuteranopia (no green cones) | #5A70A3 | 0.064 |
| Tritanopia (no blue cones) | #00898B | 0.056 |
| Achromatopsia (no color) | #767676 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #187FA3
#187FA3
oklch(55.8% 0.103 228)
- #A4603B
#A4603B
oklch(55.8% 0.102 48.2)
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 #187FA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Nice Blue #107AB0 ΔE 0.028
- Cerulean #457B9D ΔE 0.029
- Ocean #017B92 ΔE 0.029
- Teal Blue #01889F ΔE 0.029
- Blue NCS #118AB2 ΔE 0.035
- Sea Blue #047495 ΔE 0.037
- Dull Blue #49759C ΔE 0.039
- Stormy Blue #507B9C ΔE 0.039
Use #187FA3 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.