#42BFC0
Closest named color: Topaz (#13BBAF). oklch(73.8% 0.108 195.8), rgb(66, 191, 192).
Aa
Black text reads best on this color (9.44:1).
About this color
#42BFC0 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 74%, its chroma 0.108 and its hue 196°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.033 away. Black text reads best on it, at 9.44:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (74%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.44:1 |
| White text | 2.22:1 |
Values
| HEX | #42BFC0 |
| RGB | rgb(66, 191, 192) |
| HSL | hsl(180, 50%, 51%) |
| OKLCH | oklch(73.8% 0.108 195.8) |
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 #42BFC0 | 2.22:1 | Fails | Lc -48.2 | Large or bold text, headings |
| Black text on #42BFC0 | 9.44:1 | AAA | Lc 60.5 | Content text, not long reading |
| #42BFC0 text on white | 2.22:1 | Fails | Lc 43.5 | Non-text elements, placeholder text |
| #42BFC0 text on black | 9.44:1 | AAA | Lc -58.7 | Large or bold text, headings |
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 400.
-
Step 50
50
#EFF7F7
oklch(97% 0.008 197)
-
Step 100
100
#DCEEEE
oklch(93.6% 0.019 196.8)
-
Step 200
200
#BEE1E1
oklch(88.5% 0.037 196.5)
-
Step 300
300
#8CCFCF
oklch(81% 0.068 195.9)
-
Step 400
400 (this color)
#42BFC0
oklch(73.8% 0.108 195.8)
-
Step 500
500
#009D9E
oklch(63.1% 0.108 195.6)
-
Step 600
600
#008485
oklch(55.6% 0.095 195.7)
-
Step 700
700
#006F70
oklch(49.1% 0.084 195.9)
-
Step 800
800
#005B5C
oklch(42.7% 0.073 196.1)
-
Step 900
900
#004C4D
oklch(37.8% 0.064 196.3)
-
Step 950
950
#002D2E
oklch(27% 0.046 197.1)
#42BFC0 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) | #B3B6C0 | 0.112 |
| Deuteranopia (no green cones) | #9FA8C1 | 0.104 |
| Tritanopia (no blue cones) | #00C5BF | 0.023 |
| Achromatopsia (no color) | #AEAEAE | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42BFC0
#42BFC0
oklch(73.8% 0.108 195.8)
- #E68D93
#E68D93
oklch(73.7% 0.109 15.7)
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 #42BFC0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.033
- Dark Turquoise #00CED1 ΔE 0.042
- Light Sea Green #20B2AA ΔE 0.049
- Turquoise Blue #06B1C4 ΔE 0.050
- Medium Turquoise #48D1CC ΔE 0.051
- Greeny Blue #42B395 ΔE 0.062
- Medium Aquamarine #66CDAA ΔE 0.064
- Pale Teal #82CBB2 ΔE 0.069
Use #42BFC0 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.