#40ACE5
Closest named color: Deep Sky Blue (#00BFFF). oklch(70.7% 0.127 235.9), rgb(64, 172, 229).
Aa
Black text reads best on this color (8.25:1).
About this color
#40ACE5 is a medium-light, moderately saturated blue. In OKLCH its lightness is 71%, its chroma 0.127 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.056 away. Black text reads best on it, at 8.25:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.127) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 8.25:1 |
| White text | 2.54:1 |
Values
| HEX | #40ACE5 |
| RGB | rgb(64, 172, 229) |
| HSL | hsl(201, 76%, 57%) |
| OKLCH | oklch(70.7% 0.127 235.9) |
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 #40ACE5 | 2.54:1 | Fails | Lc -54.6 | Large or bold text, headings |
| Black text on #40ACE5 | 8.25:1 | AAA | Lc 54.5 | Large or bold text, headings |
| #40ACE5 text on white | 2.54:1 | Fails | Lc 49.5 | Large or bold text, headings |
| #40ACE5 text on black | 8.25:1 | AAA | Lc -52.4 | 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
#EFF7FC
oklch(97.2% 0.011 234.8)
-
Step 100
100
#DCEDF7
oklch(93.6% 0.023 233.4)
-
Step 200
200
#BEDEF3
oklch(88.4% 0.045 236.8)
-
Step 300
300
#8EC9ED
oklch(80.8% 0.079 235.9)
-
Step 400
400 (this color)
#40ACE5
oklch(70.7% 0.127 235.9)
-
Step 500
500
#0094D0
oklch(63.1% 0.136 236.2)
-
Step 600
600
#007CAF
oklch(55.5% 0.12 236.1)
-
Step 700
700
#006994
oklch(49.2% 0.105 235.5)
-
Step 800
800
#00567A
oklch(42.8% 0.091 235.4)
-
Step 900
900
#004766
oklch(37.6% 0.081 235.8)
-
Step 950
950
#002A3F
oklch(27% 0.059 236.5)
#40ACE5 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) | #91ABE8 | 0.076 |
| Deuteranopia (no green cones) | #7A9BE4 | 0.063 |
| Tritanopia (no blue cones) | #00BBBF | 0.083 |
| Achromatopsia (no color) | #A2A2A2 | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40ACE5
#40ACE5
oklch(70.7% 0.127 235.9)
- #DC8A4C
#DC8A4C
oklch(70.7% 0.127 55.9)
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 #40ACE5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.056
- Turquoise Blue #06B1C4 ΔE 0.060
- Chefchaouen Blue #4895EF ΔE 0.068
- Cornflower Blue #6495ED ΔE 0.069
- Greyblue #77A1B5 ΔE 0.077
- Vivid Sky Blue #4CC9F0 ΔE 0.081
- Dark Sky Blue #448EE4 ΔE 0.083
- Bright Sky Blue #02CCFE ΔE 0.085
Use #40ACE5 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.