#42CEBC
Closest named color: Medium Turquoise (#48D1CC). oklch(77.3% 0.121 182.8), rgb(66, 206, 188).
Aa
Black text reads best on this color (10.78:1).
About this color
#42CEBC is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 77%, its chroma 0.121 and its hue 183°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Turquoise (#48D1CC), ΔE 0.023 away. Black text reads best on it, at 10.78:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (77%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Medium Turquoise (#48D1CC) |
| Black text | 10.78:1 |
| White text | 1.94:1 |
Values
| HEX | #42CEBC |
| RGB | rgb(66, 206, 188) |
| HSL | hsl(172, 59%, 53%) |
| OKLCH | oklch(77.3% 0.121 182.8) |
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 #42CEBC | 1.94:1 | Fails | Lc -41.4 | Non-text elements, placeholder text |
| Black text on #42CEBC | 10.78:1 | AAA | Lc 66.9 | Content text, not long reading |
| #42CEBC text on white | 1.94:1 | Fails | Lc 37.0 | Non-text elements, placeholder text |
| #42CEBC text on black | 10.78:1 | AAA | Lc -65.4 | Content text, not long reading |
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 300.
-
Step 50
50
#EAF9F6
oklch(97% 0.016 182.7)
-
Step 100
100
#D1F2EC
oklch(93.6% 0.035 183.4)
-
Step 200
200
#A7E8DD
oklch(88.4% 0.067 183.1)
-
Step 300
300 (this color)
#42CEBC
oklch(77.3% 0.121 182.8)
-
Step 400
400
#00BAA8
oklch(70.8% 0.126 182.8)
-
Step 500
500
#009F90
oklch(63.1% 0.112 183.2)
-
Step 600
600
#008678
oklch(55.6% 0.1 182.2)
-
Step 700
700
#007165
oklch(49.2% 0.088 182.2)
-
Step 800
800
#005C53
oklch(42.6% 0.076 183.4)
-
Step 900
900
#004D45
oklch(37.7% 0.067 183.1)
-
Step 950
950
#002E28
oklch(27% 0.049 181.5)
#42CEBC 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) | #C4C2BB | 0.128 |
| Deuteranopia (no green cones) | #B0B4BE | 0.121 |
| Tritanopia (no blue cones) | #00D2C8 | 0.020 |
| Achromatopsia (no color) | #BABABA | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42CEBC
#42CEBC
oklch(77.3% 0.121 182.8)
- #F593AE
#F593AE
oklch(77.2% 0.122 2.6)
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 #42CEBC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Turquoise #48D1CC ΔE 0.023
- Medium Aquamarine #66CDAA ΔE 0.030
- Dark Turquoise #00CED1 ΔE 0.032
- Seafoam Blue #78D1B6 ΔE 0.040
- Pale Teal #82CBB2 ΔE 0.046
- Turquoise #40E0D0 ΔE 0.051
- Emerald #06D6A0 ΔE 0.055
- Topaz #13BBAF ΔE 0.059
Use #42CEBC 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.