#40BFA1
Closest named color: Topaz (#13BBAF). oklch(72.7% 0.119 173.9), rgb(64, 191, 161).
Aa
Black text reads best on this color (9.18:1).
About this color
#40BFA1 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 73%, its chroma 0.119 and its hue 174°. Its hue sits on the cool side of the wheel. The nearest named color is Topaz (#13BBAF), ΔE 0.030 away. Black text reads best on it, at 9.18:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 9.18:1 |
| White text | 2.28:1 |
Values
| HEX | #40BFA1 |
| RGB | rgb(64, 191, 161) |
| HSL | hsl(166, 50%, 50%) |
| OKLCH | oklch(72.7% 0.119 173.9) |
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 #40BFA1 | 2.28:1 | Fails | Lc -49.6 | Large or bold text, headings |
| Black text on #40BFA1 | 9.18:1 | AAA | Lc 59.2 | Large or bold text, headings |
| #40BFA1 text on white | 2.28:1 | Fails | Lc 44.7 | Non-text elements, placeholder text |
| #40BFA1 text on black | 9.18:1 | AAA | Lc -57.4 | 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
#DCEFE9
oklch(93.6% 0.022 175)
-
Step 200
200
#BEE3D7
oklch(88.6% 0.042 173.7)
-
Step 300
300
#8DD1BD
oklch(81% 0.075 174)
-
Step 400
400 (this color)
#40BFA1
oklch(72.7% 0.119 173.9)
-
Step 500
500
#00A084
oklch(63% 0.119 174.3)
-
Step 600
600
#00876E
oklch(55.6% 0.106 173.6)
-
Step 700
700
#00725C
oklch(49.2% 0.094 173.1)
-
Step 800
800
#005D4B
oklch(42.7% 0.081 173.5)
-
Step 900
900
#004E3F
oklch(37.8% 0.072 174.1)
-
Step 950
950
#002E24
oklch(26.9% 0.051 173.7)
#40BFA1 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) | #B9B3A0 | 0.124 |
| Deuteranopia (no green cones) | #A7A6A3 | 0.119 |
| Tritanopia (no blue cones) | #00C1B6 | 0.031 |
| Achromatopsia (no color) | #ABABAB | 0.120 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40BFA1
#40BFA1
oklch(72.7% 0.119 173.9)
- #E186AC
#E186AC
oklch(72.7% 0.12 353.9)
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 #40BFA1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.030
- Greeny Blue #42B395 ΔE 0.034
- Green Blue #01C08D ΔE 0.037
- Greenblue #23C48B ΔE 0.041
- Light Sea Green #20B2AA ΔE 0.048
- Medium Aquamarine #66CDAA ΔE 0.051
- Dark Seafoam #1FB57A ΔE 0.060
- Tea #65AB7C ΔE 0.063
Use #40BFA1 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.