#04CA9B
Closest named color: Greenblue (#23C48B). oklch(74.6% 0.15 168.4), rgb(4, 202, 155).
Aa
Black text reads best on this color (9.92:1).
About this color
#04CA9B is a medium-light, vivid green. In OKLCH its lightness is 75%, its chroma 0.150 and its hue 168°. Its hue sits between the warm and cool halves of the wheel. The nearest named color is Greenblue (#23C48B), ΔE 0.023 away. Black text reads best on it, at 9.92:1.
| Hue family | Greens |
| Lightness | medium-light (75%) |
| Chroma | vivid (0.150) |
| Temperature | in between |
| Nearest name | Greenblue (#23C48B) |
| Black text | 9.92:1 |
| White text | 2.11:1 |
Values
| HEX | #04CA9B |
| RGB | rgb(4, 202, 155) |
| HSL | hsl(166, 96%, 40%) |
| OKLCH | oklch(74.6% 0.15 168.4) |
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 #04CA9B | 2.11:1 | Fails | Lc -45.4 | Large or bold text, headings |
| Black text on #04CA9B | 9.92:1 | AAA | Lc 63.2 | Content text, not long reading |
| #04CA9B text on white | 2.11:1 | Fails | Lc 40.8 | Non-text elements, placeholder text |
| #04CA9B text on black | 9.92:1 | AAA | Lc -61.5 | Content text, not long reading |
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
#EEF8F4
oklch(97.1% 0.012 170.3)
-
Step 100
100
#D9F0E6
oklch(93.5% 0.028 167.8)
-
Step 200
200
#B9E5D3
oklch(88.6% 0.052 168.3)
-
Step 300
300
#81D4B6
oklch(80.8% 0.093 168.9)
-
Step 400
400 (this color)
#04CA9B
oklch(74.6% 0.15 168.4)
-
Step 500
500
#00A17B
oklch(63% 0.127 168.5)
-
Step 600
600
#008867
oklch(55.7% 0.112 168.2)
-
Step 700
700
#007256
oklch(49% 0.099 168.4)
-
Step 800
800
#005E46
oklch(42.8% 0.087 168)
-
Step 900
900
#004E3A
oklch(37.7% 0.076 168.5)
-
Step 950
950
#002F21
oklch(27.1% 0.055 167.3)
#04CA9B 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) | #C4BB99 | 0.151 |
| Deuteranopia (no green cones) | #B0AC9E | 0.146 |
| Tritanopia (no blue cones) | #00CBBD | 0.048 |
| Achromatopsia (no color) | #B2B2B2 | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #04CA9B
#04CA9B
oklch(74.6% 0.15 168.4)
- #F082BC
#F082BC
oklch(74.5% 0.15 348.5)
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 #04CA9B, closest first.
No curated palette has a color within ΔE 0.04 of #04CA9B.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greenblue #23C48B ΔE 0.023
- Green Blue #01C08D ΔE 0.030
- Emerald #06D6A0 ΔE 0.034
- Medium Aquamarine #66CDAA ΔE 0.051
- Dark Mint #48C072 ΔE 0.051
- Dark Mint Green #20C073 ΔE 0.052
- Seaweed #18D17B ΔE 0.052
- Algae Green #21C36F ΔE 0.055
Use #04CA9B 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.