#40CFE7
Closest named color: Vivid Sky Blue (#4CC9F0). oklch(79% 0.122 211.3), rgb(64, 207, 231).
Aa
Black text reads best on this color (11.29:1).
About this color
#40CFE7 is a light, moderately saturated teal or cyan. In OKLCH its lightness is 79%, its chroma 0.122 and its hue 211°. Its hue sits on the cool side of the wheel. The nearest named color is Vivid Sky Blue (#4CC9F0), ΔE 0.025 away. Black text reads best on it, at 11.29:1.
| Hue family | Teals and cyans |
| Lightness | light (79%) |
| Chroma | moderately saturated (0.122) |
| Temperature | cool |
| Nearest name | Vivid Sky Blue (#4CC9F0) |
| Black text | 11.29:1 |
| White text | 1.85:1 |
Values
| HEX | #40CFE7 |
| RGB | rgb(64, 207, 231) |
| HSL | hsl(189, 78%, 58%) |
| OKLCH | oklch(79% 0.122 211.3) |
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 #40CFE7 | 1.85:1 | Fails | Lc -38.8 | Non-text elements, placeholder text |
| Black text on #40CFE7 | 11.29:1 | AAA | Lc 69.2 | Content text, not long reading |
| #40CFE7 text on white | 1.85:1 | Fails | Lc 34.7 | Non-text elements, placeholder text |
| #40CFE7 text on black | 11.29:1 | AAA | Lc -67.9 | 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
#EAF9FC
oklch(97.2% 0.016 211)
-
Step 100
100
#D0F1F7
oklch(93.6% 0.035 209.8)
-
Step 200
200
#A5E6F3
oklch(88.6% 0.068 211.4)
-
Step 300
300 (this color)
#40CFE7
oklch(79% 0.122 211.3)
-
Step 400
400
#00B4CC
oklch(70.6% 0.123 211.4)
-
Step 500
500
#009BAF
oklch(63.2% 0.11 210.8)
-
Step 600
600
#008294
oklch(55.7% 0.097 211.6)
-
Step 700
700
#006D7C
oklch(49% 0.085 211.2)
-
Step 800
800
#005966
oklch(42.6% 0.074 211.8)
-
Step 900
900
#004B55
oklch(37.8% 0.065 210)
-
Step 950
950
#002C33
oklch(26.9% 0.047 211.1)
#40CFE7 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) | #BCC8E8 | 0.114 |
| Deuteranopia (no green cones) | #A4B7E7 | 0.102 |
| Tritanopia (no blue cones) | #00D9D6 | 0.045 |
| Achromatopsia (no color) | #BEBEBE | 0.122 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40CFE7
#40CFE7
oklch(79% 0.122 211.3)
- #FF9C8A
#FF9C8A
oklch(79% 0.122 31.1)
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 #40CFE7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Vivid Sky Blue #4CC9F0 ΔE 0.025
- Aqua Blue #02D8E9 ΔE 0.026
- Dark Turquoise #00CED1 ΔE 0.038
- Bright Sky Blue #02CCFE ΔE 0.039
- Medium Turquoise #48D1CC ΔE 0.041
- Lightblue #7BC8F6 ΔE 0.053
- Sky Blue #87CEEB ΔE 0.053
- Sky #82CAFC ΔE 0.062
Use #40CFE7 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.