#40B7B7
Closest named color: Topaz (#13BBAF). oklch(71.5% 0.104 195.1), rgb(64, 183, 183).
Aa
Black text reads best on this color (8.67:1).
About this color
#40B7B7 is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 71%, its chroma 0.104 and its hue 195°. 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 8.67:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Topaz (#13BBAF) |
| Black text | 8.67:1 |
| White text | 2.42:1 |
Values
| HEX | #40B7B7 |
| RGB | rgb(64, 183, 183) |
| HSL | hsl(180, 48%, 48%) |
| OKLCH | oklch(71.5% 0.104 195.1) |
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 #40B7B7 | 2.42:1 | Fails | Lc -52.3 | Large or bold text, headings |
| Black text on #40B7B7 | 8.67:1 | AAA | Lc 56.7 | Large or bold text, headings |
| #40B7B7 text on white | 2.42:1 | Fails | Lc 47.3 | Large or bold text, headings |
| #40B7B7 text on black | 8.67:1 | AAA | Lc -54.7 | 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
#EFF7F7
oklch(97% 0.008 197)
-
Step 100
100
#DCEEEE
oklch(93.6% 0.019 196.8)
-
Step 200
200
#BFE1E0
oklch(88.5% 0.036 194.3)
-
Step 300
300
#8ECECE
oklch(80.8% 0.065 195.9)
-
Step 400
400 (this color)
#40B7B7
oklch(71.5% 0.104 195.1)
-
Step 500
500
#009D9E
oklch(63.1% 0.108 195.6)
-
Step 600
600
#008485
oklch(55.6% 0.095 195.7)
-
Step 700
700
#006F6F
oklch(49% 0.084 194.8)
-
Step 800
800
#005B5B
oklch(42.7% 0.073 194.8)
-
Step 900
900
#004C4C
oklch(37.7% 0.064 194.8)
-
Step 950
950
#002D2D
oklch(26.9% 0.046 194.8)
#40B7B7 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) | #ABAEB7 | 0.108 |
| Deuteranopia (no green cones) | #99A1B8 | 0.101 |
| Tritanopia (no blue cones) | #00BDB7 | 0.023 |
| Achromatopsia (no color) | #A6A6A6 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40B7B7
#40B7B7
oklch(71.5% 0.104 195.1)
- #DC878E
#DC878E
oklch(71.4% 0.105 14.7)
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 #40B7B7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Topaz #13BBAF ΔE 0.025
- Light Sea Green #20B2AA ΔE 0.028
- Turquoise Blue #06B1C4 ΔE 0.035
- Greeny Blue #42B395 ΔE 0.048
- Dark Turquoise #00CED1 ΔE 0.064
- Cadet Blue #5F9EA0 ΔE 0.069
- Greyblue #77A1B5 ΔE 0.072
- Medium Turquoise #48D1CC ΔE 0.074
Use #40B7B7 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.