#40BFA7
Closest named color: Topaz (#13BBAF). oklch(72.9% 0.116 177.7), rgb(64, 191, 167).
Aa
Black text reads best on this color (9.22:1).
About this color
#40BFA7 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 73%, its chroma 0.116 and its hue 178°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.025 away. Black text reads best on it, at 9.22:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.116) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.22:1 |
| White text | 2.27:1 |
Values
| HEX | #40BFA7 |
| RGB | rgb(64, 191, 167) |
| HSL | hsl(169, 50%, 50%) |
| OKLCH | oklch(72.9% 0.116 177.7) |
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 #40BFA7 | 2.27:1 | Fails | Lc -49.4 | Large or bold text, headings |
| Black text on #40BFA7 | 9.22:1 | AAA | Lc 59.4 | Large or bold text, headings |
| #40BFA7 text on white | 2.27:1 | Fails | Lc 44.5 | Non-text elements, placeholder text |
| #40BFA7 text on black | 9.22:1 | AAA | Lc -57.6 | 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
#EFF8F5
oklch(97.2% 0.01 174.3)
-
Step 100
100
#DCEFEA
oklch(93.7% 0.021 178.3)
-
Step 200
200
#BEE2D9
oklch(88.4% 0.04 178.5)
-
Step 300
300
#8DD0C0
oklch(80.8% 0.072 177.8)
-
Step 400
400 (this color)
#40BFA7
oklch(72.9% 0.116 177.7)
-
Step 500
500
#00A089
oklch(63.1% 0.116 177.6)
-
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
#005D4F
oklch(42.8% 0.079 177.8)
-
Step 900
900
#004D41
oklch(37.6% 0.069 177.7)
-
Step 950
950
#002E26
oklch(26.9% 0.05 177.5)
#40BFA7 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) | #B8B4A6 | 0.122 |
| Deuteranopia (no green cones) | #A6A6A9 | 0.117 |
| Tritanopia (no blue cones) | #00C2B8 | 0.026 |
| Achromatopsia (no color) | #ACACAC | 0.117 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40BFA7
#40BFA7
oklch(72.9% 0.116 177.7)
- #E288A7
#E288A7
oklch(73% 0.115 358.2)
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 #40BFA7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.025
- Greeny Blue #42B395 ΔE 0.037
- Light Sea Green #20B2AA ΔE 0.044
- Green Blue #01C08D ΔE 0.045
- Greenblue #23C48B ΔE 0.049
- Medium Aquamarine #66CDAA ΔE 0.051
- Dark Turquoise #00CED1 ΔE 0.061
- Medium Turquoise #48D1CC ΔE 0.064
Use #40BFA7 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.