#187C63
Closest named color: Bluegreen (#017A79). oklch(52.5% 0.096 171.1), rgb(24, 124, 99).
Aa
White text reads best on this color (5.11:1).
About this color
#187C63 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 53%, its chroma 0.096 and its hue 171°. Its hue sits on the cool side of the wheel. The nearest named color is Bluegreen (#017A79), ΔE 0.037 away. White text reads best on it, at 5.11:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (53%) |
| Chroma | moderately saturated (0.096) |
| Temperature | cool |
| Nearest name | Bluegreen (#017A79) |
| Black text | 4.10:1 |
| White text | 5.11:1 |
Values
| HEX | #187C63 |
| RGB | rgb(24, 124, 99) |
| HSL | hsl(165, 68%, 29%) |
| OKLCH | oklch(52.5% 0.096 171.1) |
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 #187C63 | 5.11:1 | AA | Lc -80.3 | Fine for body text |
| Black text on #187C63 | 4.10:1 | AA large text | Lc 29.2 | Dividers and decoration only |
| #187C63 text on white | 5.11:1 | AA | Lc 74.9 | Content text, not long reading |
| #187C63 text on black | 4.10:1 | AA large text | Lc -26.8 | 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
#F2F7F5
oklch(97.2% 0.006 170.4)
-
Step 100
100
#E2EDE9
oklch(93.7% 0.013 172.4)
-
Step 200
200
#CADFD7
oklch(88.6% 0.025 170.9)
-
Step 300
300
#A6CABD
oklch(80.9% 0.043 171.3)
-
Step 400
400
#73AF9B
oklch(70.7% 0.069 171.3)
-
Step 500
500
#4A9B82
oklch(63.1% 0.089 170.7)
-
Step 600
600 (this color)
#187C63
oklch(52.5% 0.096 171.1)
-
Step 700
700
#16715A
oklch(49.2% 0.089 171)
-
Step 800
800
#175C4A
oklch(42.7% 0.074 171.5)
-
Step 900
900
#1B4B3D
oklch(37.5% 0.058 171)
-
Step 950
950
#122C24
oklch(27% 0.036 171.2)
#187C63 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) | #787362 | 0.099 |
| Deuteranopia (no green cones) | #6B6A65 | 0.094 |
| Tritanopia (no blue cones) | #007D75 | 0.027 |
| Achromatopsia (no color) | #6E6E6E | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #187C63
#187C63
oklch(52.5% 0.096 171.1)
- #945271
#945271
oklch(52.6% 0.096 351.3)
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 #187C63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluegreen #017A79 ΔE 0.037
- Dark Aquamarine #017371 ΔE 0.042
- Teal #008080 ΔE 0.043
- Deep Turquoise #017374 ΔE 0.046
- Deep Aqua #08787F ΔE 0.050
- Jungle Green #048243 ΔE 0.055
- Sea Green #2E8B57 ΔE 0.057
- Dark Sage #598556 ΔE 0.065
Use #187C63 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.