#42B499
Closest named color: Greeny Blue (#42B395). oklch(69.8% 0.11 174.3), rgb(66, 180, 153).
Aa
Black text reads best on this color (8.22:1).
About this color
#42B499 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 70%, its chroma 0.110 and its hue 174°. Its hue sits on the cool side of the wheel. The nearest named color is Greeny Blue (#42B395), ΔE 0.006 away. Black text reads best on it, at 8.22:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.110) |
| Temperature | cool |
| Nearest name | Greeny Blue (#42B395) |
| Black text | 8.22:1 |
| White text | 2.55:1 |
Values
| HEX | #42B499 |
| RGB | rgb(66, 180, 153) |
| HSL | hsl(166, 46%, 48%) |
| OKLCH | oklch(69.8% 0.11 174.3) |
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 #42B499 | 2.55:1 | Fails | Lc -54.8 | Large or bold text, headings |
| Black text on #42B499 | 8.22:1 | AAA | Lc 54.3 | Large or bold text, headings |
| #42B499 text on white | 2.55:1 | Fails | Lc 49.7 | Large or bold text, headings |
| #42B499 text on black | 8.22:1 | AAA | Lc -52.2 | 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
#F0F8F5
oklch(97.2% 0.009 171.8)
-
Step 100
100
#DDEEE9
oklch(93.5% 0.019 176.4)
-
Step 200
200
#C0E2D7
oklch(88.5% 0.039 173.8)
-
Step 300
300
#91D0BD
oklch(80.9% 0.07 173.7)
-
Step 400
400 (this color)
#42B499
oklch(69.8% 0.11 174.3)
-
Step 500
500
#00A084
oklch(63% 0.119 174.3)
-
Step 600
600
#00876F
oklch(55.6% 0.106 174.3)
-
Step 700
700
#00715D
oklch(49% 0.093 174.7)
-
Step 800
800
#005D4C
oklch(42.7% 0.081 174.6)
-
Step 900
900
#004E3F
oklch(37.8% 0.072 174.1)
-
Step 950
950
#002E25
oklch(26.9% 0.05 175.6)
#42B499 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) | #AEA998 | 0.115 |
| Deuteranopia (no green cones) | #9E9D9B | 0.110 |
| Tritanopia (no blue cones) | #00B6AC | 0.030 |
| Achromatopsia (no color) | #A2A2A2 | 0.111 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42B499
#42B499
oklch(69.8% 0.11 174.3)
- #D380A2
#D380A2
oklch(69.8% 0.11 354.2)
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 #42B499, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greeny Blue #42B395 ΔE 0.006
- Light Sea Green #20B2AA ΔE 0.030
- Topaz #13BBAF ΔE 0.032
- Tea #65AB7C ΔE 0.042
- Green Blue #01C08D ΔE 0.047
- Dark Seafoam Green #3EAF76 ΔE 0.048
- Bluey Green #2BB179 ΔE 0.048
- Dark Seafoam #1FB57A ΔE 0.050
Use #42B499 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.