#40CBA5
Closest named color: Medium Aquamarine (#66CDAA). oklch(75.8% 0.131 170.7), rgb(64, 203, 165).
Aa
Black text reads best on this color (10.30:1).
About this color
#40CBA5 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 76%, its chroma 0.131 and its hue 171°. Its hue sits on the cool side of the wheel. The nearest named color is Medium Aquamarine (#66CDAA), ΔE 0.028 away. Black text reads best on it, at 10.30:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (76%) |
| Chroma | moderately saturated (0.131) |
| Temperature | cool |
| Nearest name | Medium Aquamarine (#66CDAA) |
| Black text | 10.30:1 |
| White text | 2.03:1 |
Values
| HEX | #40CBA5 |
| RGB | rgb(64, 203, 165) |
| HSL | hsl(164, 57%, 52%) |
| OKLCH | oklch(75.8% 0.131 170.7) |
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 #40CBA5 | 2.03:1 | Fails | Lc -43.8 | Non-text elements, placeholder text |
| Black text on #40CBA5 | 10.30:1 | AAA | Lc 64.6 | Content text, not long reading |
| #40CBA5 text on white | 2.03:1 | Fails | Lc 39.3 | Non-text elements, placeholder text |
| #40CBA5 text on black | 10.30:1 | AAA | Lc -63.1 | 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 300.
-
Step 50
50
#EBFAF4
oklch(97.2% 0.018 170.1)
-
Step 100
100
#D2F3E6
oklch(93.7% 0.039 169.7)
-
Step 200
200
#A9E9D2
oklch(88.5% 0.072 170.4)
-
Step 300
300 (this color)
#40CBA5
oklch(75.8% 0.131 170.7)
-
Step 400
400
#00BC94
oklch(70.8% 0.139 170.4)
-
Step 500
500
#00A17F
oklch(63.1% 0.124 170.8)
-
Step 600
600
#00876A
oklch(55.5% 0.109 170.8)
-
Step 700
700
#007259
oklch(49.1% 0.097 170.7)
-
Step 800
800
#005D48
oklch(42.6% 0.084 170.6)
-
Step 900
900
#004E3C
oklch(37.7% 0.074 170.6)
-
Step 950
950
#002F23
oklch(27.2% 0.053 170.5)
#40CBA5 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) | #C5BEA3 | 0.133 |
| Deuteranopia (no green cones) | #B2B0A8 | 0.128 |
| Tritanopia (no blue cones) | #00CDC0 | 0.037 |
| Achromatopsia (no color) | #B6B6B6 | 0.132 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40CBA5
#40CBA5
oklch(75.8% 0.131 170.7)
- #EF8CBB
#EF8CBB
oklch(75.8% 0.132 350.8)
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 #40CBA5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Medium Aquamarine #66CDAA ΔE 0.028
- Emerald #06D6A0 ΔE 0.036
- Greenblue #23C48B ΔE 0.041
- Green Blue #01C08D ΔE 0.048
- Seafoam Blue #78D1B6 ΔE 0.053
- Medium Turquoise #48D1CC ΔE 0.055
- Pale Teal #82CBB2 ΔE 0.056
- Topaz #13BBAF ΔE 0.057
Use #40CBA5 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.