#42AAA9
Closest named color: Light Sea Green (#20B2AA). oklch(67.8% 0.095 194.3), rgb(66, 170, 169).
Aa
Black text reads best on this color (7.55:1).
About this color
#42AAA9 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 68%, its chroma 0.095 and its hue 194°. Its hue sits on the cool side of the wheel. The nearest named color is Light Sea Green (#20B2AA), ΔE 0.025 away. Black text reads best on it, at 7.55:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.095) |
| Temperature | cool |
| Nearest name | Light Sea Green (#20B2AA) |
| Black text | 7.55:1 |
| White text | 2.77:1 |
Values
| HEX | #42AAA9 |
| RGB | rgb(66, 170, 169) |
| HSL | hsl(179, 44%, 46%) |
| OKLCH | oklch(67.8% 0.095 194.3) |
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 #42AAA9 | 2.77:1 | Fails | Lc -58.6 | Large or bold text, headings |
| Black text on #42AAA9 | 7.55:1 | AAA | Lc 50.7 | Large or bold text, headings |
| #42AAA9 text on white | 2.77:1 | Fails | Lc 53.3 | Large or bold text, headings |
| #42AAA9 text on black | 7.55:1 | AAA | Lc -48.5 | 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
#F0F7F7
oklch(97.1% 0.007 197)
-
Step 100
100
#DEEEED
oklch(93.7% 0.017 192.3)
-
Step 200
200
#C1E0DF
oklch(88.4% 0.033 194.2)
-
Step 300
300
#94CDCC
oklch(80.9% 0.059 194.7)
-
Step 400
400 (this color)
#42AAA9
oklch(67.8% 0.095 194.3)
-
Step 500
500
#009D9D
oklch(63% 0.108 194.8)
-
Step 600
600
#008484
oklch(55.5% 0.095 194.8)
-
Step 700
700
#006F6F
oklch(49% 0.084 194.8)
-
Step 800
800
#005B5B
oklch(42.7% 0.073 194.8)
-
Step 900
900
#004C4C
oklch(37.7% 0.064 194.8)
-
Step 950
950
#002D2D
oklch(26.9% 0.046 194.8)
#42AAA9 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) | #A0A2A9 | 0.099 |
| Deuteranopia (no green cones) | #8F96AA | 0.092 |
| Tritanopia (no blue cones) | #00AFA9 | 0.024 |
| Achromatopsia (no color) | #9B9B9B | 0.095 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42AAA9
#42AAA9
oklch(67.8% 0.095 194.3)
- #CB7F86
#CB7F86
oklch(67.8% 0.095 13.9)
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 #42AAA9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Sea Green #20B2AA ΔE 0.025
- Cadet Blue #5F9EA0 ΔE 0.036
- Turquoise Blue #06B1C4 ΔE 0.040
- Dull Teal #5F9E8F ΔE 0.044
- Greeny Blue #42B395 ΔE 0.046
- Topaz #13BBAF ΔE 0.048
- Grey Teal #5E9B8A ΔE 0.052
- Persian Green #2A9D8F ΔE 0.052
Use #42AAA9 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.