#42BACA
Closest named color: Turquoise Blue (#06B1C4). oklch(72.9% 0.106 207.7), rgb(66, 186, 202).
Aa
Black text reads best on this color (9.10:1).
About this color
#42BACA is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 73%, its chroma 0.106 and its hue 208°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.036 away. Black text reads best on it, at 9.10:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 9.10:1 |
| White text | 2.30:1 |
Values
| HEX | #42BACA |
| RGB | rgb(66, 186, 202) |
| HSL | hsl(187, 56%, 53%) |
| OKLCH | oklch(72.9% 0.106 207.7) |
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 #42BACA | 2.30:1 | Fails | Lc -50.0 | Large or bold text, headings |
| Black text on #42BACA | 9.10:1 | AAA | Lc 58.8 | Large or bold text, headings |
| #42BACA text on white | 2.30:1 | Fails | Lc 45.1 | Large or bold text, headings |
| #42BACA text on black | 9.10:1 | AAA | Lc -57.0 | 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
#EFF7F8
oklch(97% 0.009 205.9)
-
Step 100
100
#DCEEF0
oklch(93.6% 0.019 204.8)
-
Step 200
200
#BEE1E6
oklch(88.6% 0.037 207)
-
Step 300
300
#8DCDD7
oklch(80.9% 0.066 208.2)
-
Step 400
400 (this color)
#42BACA
oklch(72.9% 0.106 207.7)
-
Step 500
500
#009BAB
oklch(63% 0.108 207.7)
-
Step 600
600
#008290
oklch(55.5% 0.095 208)
-
Step 700
700
#006E79
oklch(49.2% 0.084 206.9)
-
Step 800
800
#005A64
oklch(42.8% 0.073 207.9)
-
Step 900
900
#004B53
oklch(37.7% 0.065 207)
-
Step 950
950
#002D32
oklch(27.1% 0.046 206.3)
#42BACA 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) | #AAB3CB | 0.102 |
| Deuteranopia (no green cones) | #97A4CA | 0.095 |
| Tritanopia (no blue cones) | #00C2BF | 0.037 |
| Achromatopsia (no color) | #ABABAB | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42BACA
#42BACA
oklch(72.9% 0.106 207.7)
- #E38D82
#E38D82
oklch(73% 0.107 27.8)
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 #42BACA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.036
- Topaz #13BBAF ΔE 0.047
- Light Sea Green #20B2AA ΔE 0.053
- Dark Turquoise #00CED1 ΔE 0.054
- Vivid Sky Blue #4CC9F0 ΔE 0.062
- Medium Turquoise #48D1CC ΔE 0.066
- Greyblue #77A1B5 ΔE 0.074
- Greeny Blue #42B395 ΔE 0.075
Use #42BACA 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.