#188DA3
Closest named color: Teal Blue (#01889F). oklch(59.4% 0.1 214.6), rgb(24, 141, 163).
Aa
Black text reads best on this color (5.37:1).
About this color
#188DA3 is a medium-dark, moderately saturated teal or cyan. In OKLCH its lightness is 59%, its chroma 0.100 and its hue 215°. Its hue sits on the cool side of the wheel. The nearest named color is Teal Blue (#01889F), ΔE 0.017 away. Black text reads best on it, at 5.37:1.
| Hue family | Teals and cyans |
| Lightness | medium-dark (59%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Teal Blue (#01889F) |
| Black text | 5.37:1 |
| White text | 3.90:1 |
Values
| HEX | #188DA3 |
| RGB | rgb(24, 141, 163) |
| HSL | hsl(189, 74%, 37%) |
| OKLCH | oklch(59.4% 0.1 214.6) |
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 #188DA3 | 3.90:1 | AA large text | Lc -71.5 | Content text, not long reading |
| Black text on #188DA3 | 5.37:1 | AA | Lc 38.1 | Non-text elements, placeholder text |
| #188DA3 text on white | 3.90:1 | AA large text | Lc 66.0 | Content text, not long reading |
| #188DA3 text on black | 5.37:1 | AA | Lc -35.6 | 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 500.
-
Step 50
50
#F1F7F8
oklch(97.2% 0.007 208.8)
-
Step 100
100
#E0ECF0
oklch(93.5% 0.014 219.6)
-
Step 200
200
#C6DEE4
oklch(88.5% 0.027 214.4)
-
Step 300
300
#9DC9D4
oklch(80.8% 0.049 214.7)
-
Step 400
400
#63ADBF
oklch(70.6% 0.078 215.2)
-
Step 500
500 (this color)
#188DA3
oklch(59.4% 0.1 214.6)
-
Step 600
600
#008197
oklch(55.5% 0.098 215.2)
-
Step 700
700
#006D7F
oklch(49.2% 0.087 214.3)
-
Step 800
800
#005968
oklch(42.7% 0.075 214.2)
-
Step 900
900
#034A57
oklch(37.7% 0.065 214.8)
-
Step 950
950
#082B33
oklch(26.9% 0.041 216.3)
#188DA3 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) | #7D88A4 | 0.088 |
| Deuteranopia (no green cones) | #6C7BA3 | 0.081 |
| Tritanopia (no blue cones) | #009594 | 0.039 |
| Achromatopsia (no color) | #818181 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #188DA3
#188DA3
oklch(59.4% 0.1 214.6)
- #B16755
#B16755
oklch(59.2% 0.1 34.5)
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 #188DA3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Teal Blue #01889F ΔE 0.017
- Blue NCS #118AB2 ΔE 0.027
- Teal Green #0A9396 ΔE 0.031
- Dark Cyan #008B8B ΔE 0.038
- Steel Blue #4682B4 ΔE 0.054
- Off Blue #5684AE ΔE 0.054
- Cerulean #457B9D ΔE 0.054
- Dusty Blue #5A86AD ΔE 0.054
Use #188DA3 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.