#42A490
Closest named color: Persian Green (#2A9D8F). oklch(65.5% 0.097 177.4), rgb(66, 164, 144).
Aa
Black text reads best on this color (6.94:1).
About this color
#42A490 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 66%, its chroma 0.097 and its hue 177°. Its hue sits on the cool side of the wheel. The nearest named color is Persian Green (#2A9D8F), ΔE 0.027 away. Black text reads best on it, at 6.94:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Persian Green (#2A9D8F) |
| Black text | 6.94:1 |
| White text | 3.02:1 |
Values
| HEX | #42A490 |
| RGB | rgb(66, 164, 144) |
| HSL | hsl(168, 43%, 45%) |
| OKLCH | oklch(65.5% 0.097 177.4) |
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 #42A490 | 3.02:1 | AA large text | Lc -62.1 | Content text, not long reading |
| Black text on #42A490 | 6.94:1 | AA | Lc 47.3 | Large or bold text, headings |
| #42A490 text on white | 3.02:1 | AA large text | Lc 56.7 | Large or bold text, headings |
| #42A490 text on black | 6.94:1 | AA | Lc -45.0 | 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 500.
-
Step 50
50
#F1F7F5
oklch(97.1% 0.007 174.4)
-
Step 100
100
#E1EDEA
oklch(93.6% 0.013 179.5)
-
Step 200
200
#C8DFD9
oklch(88.5% 0.026 178.3)
-
Step 300
300
#A1CBC0
oklch(80.9% 0.047 177.3)
-
Step 400
400
#6AB0A0
oklch(70.6% 0.075 177.8)
-
Step 500
500 (this color)
#42A490
oklch(65.5% 0.097 177.4)
-
Step 600
600
#008673
oklch(55.5% 0.102 178.1)
-
Step 700
700
#007160
oklch(49.1% 0.091 177.4)
-
Step 800
800
#005D4E
oklch(42.8% 0.079 176.7)
-
Step 900
900
#0F4C41
oklch(37.6% 0.063 177.7)
-
Step 950
950
#0C2D26
oklch(27.1% 0.041 176.6)
#42A490 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) | #9E9B8F | 0.101 |
| Deuteranopia (no green cones) | #8F9092 | 0.096 |
| Tritanopia (no blue cones) | #00A69E | 0.027 |
| Achromatopsia (no color) | #949494 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42A490
#42A490
oklch(65.5% 0.097 177.4)
- #C07791
#C07791
oklch(65.4% 0.097 357.2)
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 #42A490, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Persian Green #2A9D8F ΔE 0.027
- Dull Teal #5F9E8F ΔE 0.027
- Grey Teal #5E9B8A ΔE 0.031
- Sea #3C9992 ΔE 0.035
- Blue Green #0F9B8E ΔE 0.038
- Cadet Blue #5F9EA0 ΔE 0.043
- Greeny Blue #42B395 ΔE 0.043
- Light Sea Green #20B2AA ΔE 0.045
Use #42A490 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.