#187A63
Closest named color: Bluegreen (#017A79). oklch(52% 0.094 172.4), rgb(24, 122, 99).
Aa
White text reads best on this color (5.24:1).
About this color
#187A63 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 52%, its chroma 0.094 and its hue 172°. Its hue sits on the cool side of the wheel. The nearest named color is Bluegreen (#017A79), ΔE 0.034 away. White text reads best on it, at 5.24:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (52%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Bluegreen (#017A79) |
| Black text | 4.00:1 |
| White text | 5.24:1 |
Values
| HEX | #187A63 |
| RGB | rgb(24, 122, 99) |
| HSL | hsl(166, 67%, 29%) |
| OKLCH | oklch(52% 0.094 172.4) |
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 #187A63 | 5.24:1 | AA | Lc -81.0 | Fine for body text |
| Black text on #187A63 | 4.00:1 | AA large text | Lc 28.4 | Dividers and decoration only |
| #187A63 text on white | 5.24:1 | AA | Lc 75.7 | Fine for body text |
| #187A63 text on black | 4.00:1 | AA large text | Lc -26.1 | 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 700.
-
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
#C9DFD7
oklch(88.5% 0.026 171.9)
-
Step 300
300
#A4CBBD
oklch(81% 0.046 171.3)
-
Step 400
400
#70B09C
oklch(70.8% 0.072 172.4)
-
Step 500
500
#449C83
oklch(63.2% 0.093 171.9)
-
Step 600
600
#1A866D
oklch(55.6% 0.1 172.5)
-
Step 700
700 (this color)
#187A63
oklch(52% 0.094 172.4)
-
Step 800
800
#0E5C4A
oklch(42.5% 0.077 172.4)
-
Step 900
900
#174C3E
oklch(37.7% 0.061 172.2)
-
Step 950
950
#102C24
oklch(26.8% 0.037 172.3)
#187A63 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) | #767162 | 0.097 |
| Deuteranopia (no green cones) | #696865 | 0.093 |
| Tritanopia (no blue cones) | #007B73 | 0.024 |
| Achromatopsia (no color) | #6C6C6C | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #187A63
#187A63
oklch(52% 0.094 172.4)
- #92516E
#92516E
oklch(52% 0.094 352.7)
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 #187A63, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bluegreen #017A79 ΔE 0.034
- Dark Aquamarine #017371 ΔE 0.037
- Deep Turquoise #017374 ΔE 0.041
- Teal #008080 ΔE 0.043
- Deep Aqua #08787F ΔE 0.047
- Jungle Green #048243 ΔE 0.060
- Dark Aqua #05696B ΔE 0.061
- Sea Green #2E8B57 ΔE 0.064
Use #187A63 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.