#42F5DB
Closest named color: Bright Aqua (#0BF9EA). oklch(87.6% 0.145 180.6), rgb(66, 245, 219).
Aa
Black text reads best on this color (15.31:1).
About this color
#42F5DB is a light, vivid teal or cyan. In OKLCH its lightness is 88%, its chroma 0.145 and its hue 181°. Its hue sits on the cool side of the wheel. The nearest named color is Bright Aqua (#0BF9EA), ΔE 0.021 away. Black text reads best on it, at 15.31:1.
| Hue family | Teals and cyans |
| Lightness | light (88%) |
| Chroma | vivid (0.145) |
| Temperature | cool |
| Nearest name | Bright Aqua (#0BF9EA) |
| Black text | 15.31:1 |
| White text | 1.37:1 |
Values
| HEX | #42F5DB |
| RGB | rgb(66, 245, 219) |
| HSL | hsl(171, 90%, 61%) |
| OKLCH | oklch(87.6% 0.145 180.6) |
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 #42F5DB | 1.37:1 | Fails | Lc -20.2 | Dividers and decoration only |
| Black text on #42F5DB | 15.31:1 | AAA | Lc 86.0 | Fine for body text |
| #42F5DB text on white | 1.37:1 | Fails | Lc 17.7 | Dividers and decoration only |
| #42F5DB text on black | 15.31:1 | AAA | Lc -85.9 | Fine for body 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 200.
-
Step 50
50
#E4FBF6
oklch(97% 0.025 181.3)
-
Step 100
100
#C4F6EC
oklch(93.6% 0.053 181.6)
-
Step 200
200 (this color)
#42F5DB
oklch(87.6% 0.145 180.6)
-
Step 300
300
#00DFC5
oklch(81% 0.147 180.3)
-
Step 400
400
#00BAA4
oklch(70.7% 0.128 180.3)
-
Step 500
500
#009F8D
oklch(63% 0.114 181)
-
Step 600
600
#008676
oklch(55.6% 0.1 180.5)
-
Step 700
700
#007163
oklch(49.2% 0.089 180.3)
-
Step 800
800
#005C51
oklch(42.6% 0.077 181.1)
-
Step 900
900
#004D43
oklch(37.7% 0.068 180.3)
-
Step 950
950
#002E28
oklch(27% 0.049 181.5)
#42F5DB 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) | #EAE6DA | 0.153 |
| Deuteranopia (no green cones) | #D2D5DD | 0.145 |
| Tritanopia (no blue cones) | #00F9ED | 0.024 |
| Achromatopsia (no color) | #DCDCDC | 0.146 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42F5DB
#42F5DB
oklch(87.6% 0.145 180.6)
- #FFC3D4
#FFC3D4
oklch(87.6% 0.072 360)
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 #42F5DB, closest first.
No curated palette has a color within ΔE 0.04 of #42F5DB.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Bright Aqua #0BF9EA ΔE 0.021
- Light Turquoise #7EF4CC ΔE 0.037
- Bright Teal #01F9C6 ΔE 0.038
- Bright Turquoise #0FFEF9 ΔE 0.040
- Bright Light Blue #26F7FD ΔE 0.046
- Bright Cyan #41FDFE ΔE 0.048
- Cyan #00FFFF ΔE 0.048
- Aquamarine #7FFFD4 ΔE 0.050
Use #42F5DB 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.