#42A2AB
Closest named color: Cadet Blue (#5F9EA0). oklch(65.9% 0.09 203.8), rgb(66, 162, 171).
Aa
Black text reads best on this color (6.98:1).
About this color
#42A2AB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.090 and its hue 204°. Its hue sits on the cool side of the wheel. The nearest named color is Cadet Blue (#5F9EA0), ΔE 0.026 away. Black text reads best on it, at 6.98:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Cadet Blue (#5F9EA0) |
| Black text | 6.98:1 |
| White text | 3.00:1 |
Values
| HEX | #42A2AB |
| RGB | rgb(66, 162, 171) |
| HSL | hsl(185, 44%, 46%) |
| OKLCH | oklch(65.9% 0.09 203.8) |
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 #42A2AB | 3.00:1 | AA large text | Lc -61.8 | Content text, not long reading |
| Black text on #42A2AB | 6.98:1 | AA | Lc 47.6 | Large or bold text, headings |
| #42A2AB text on white | 3.00:1 | AA large text | Lc 56.5 | Large or bold text, headings |
| #42A2AB text on black | 6.98:1 | AA | Lc -45.3 | 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 500.
-
Step 50
50
#F1F7F7
oklch(97.2% 0.006 197.1)
-
Step 100
100
#E1ECEE
oklch(93.5% 0.012 209.8)
-
Step 200
200
#C7DEE0
oklch(88.4% 0.025 203.1)
-
Step 300
300
#A0C9CD
oklch(80.8% 0.044 203.7)
-
Step 400
400
#69AEB5
oklch(70.8% 0.07 204)
-
Step 500
500 (this color)
#42A2AB
oklch(65.9% 0.09 203.8)
-
Step 600
600
#00838D
oklch(55.6% 0.095 204.2)
-
Step 700
700
#006E76
oklch(49.1% 0.084 203.6)
-
Step 800
800
#005A61
oklch(42.6% 0.073 204)
-
Step 900
900
#0E4A50
oklch(37.6% 0.058 205.1)
-
Step 950
950
#0C2C2F
oklch(27.1% 0.037 203.8)
#42A2AB 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) | #969CAC | 0.089 |
| Deuteranopia (no green cones) | #8690AB | 0.082 |
| Tritanopia (no blue cones) | #00A8A5 | 0.031 |
| Achromatopsia (no color) | #959595 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42A2AB
#42A2AB
oklch(65.9% 0.09 203.8)
- #C37C77
#C37C77
oklch(65.9% 0.09 24.2)
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 #42A2AB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cadet Blue #5F9EA0 ΔE 0.026
- Sea #3C9992 ΔE 0.041
- Dull Teal #5F9E8F ΔE 0.042
- Persian Green #2A9D8F ΔE 0.046
- Turquoise Blue #06B1C4 ΔE 0.048
- Light Sea Green #20B2AA ΔE 0.048
- Grey Teal #5E9B8A ΔE 0.048
- Greyblue #77A1B5 ΔE 0.054
Use #42A2AB 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.