#40AADD
Closest named color: Turquoise Blue (#06B1C4). oklch(69.9% 0.121 233.4), rgb(64, 170, 221).
Aa
Black text reads best on this color (8.01:1).
About this color
#40AADD is a medium-light, moderately saturated blue. In OKLCH its lightness is 70%, its chroma 0.121 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.052 away. Black text reads best on it, at 8.01:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.01:1 |
| White text | 2.62:1 |
Values
| HEX | #40AADD |
| RGB | rgb(64, 170, 221) |
| HSL | hsl(199, 70%, 56%) |
| OKLCH | oklch(69.9% 0.121 233.4) |
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 #40AADD | 2.62:1 | Fails | Lc -55.9 | Large or bold text, headings |
| Black text on #40AADD | 8.01:1 | AAA | Lc 53.2 | Large or bold text, headings |
| #40AADD text on white | 2.62:1 | Fails | Lc 50.8 | Large or bold text, headings |
| #40AADD text on black | 8.01:1 | AAA | Lc -51.1 | 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
#EFF7FB
oklch(97.1% 0.01 228.9)
-
Step 100
100
#DCEDF6
oklch(93.6% 0.022 230.5)
-
Step 200
200
#BFDFF1
oklch(88.6% 0.042 232.6)
-
Step 300
300
#8FCAEA
oklch(81% 0.076 232.6)
-
Step 400
400 (this color)
#40AADD
oklch(69.9% 0.121 233.4)
-
Step 500
500
#0095CB
oklch(63% 0.131 233.2)
-
Step 600
600
#007DAC
oklch(55.5% 0.116 233.8)
-
Step 700
700
#006991
oklch(49% 0.102 233.6)
-
Step 800
800
#005677
oklch(42.6% 0.088 233.1)
-
Step 900
900
#004864
oklch(37.8% 0.078 232.8)
-
Step 950
950
#002A3D
oklch(26.9% 0.056 233.8)
#40AADD 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) | #91A8DF | 0.077 |
| Deuteranopia (no green cones) | #7C99DC | 0.066 |
| Tritanopia (no blue cones) | #00B8BB | 0.076 |
| Achromatopsia (no color) | #A0A0A0 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #40AADD
#40AADD
oklch(69.9% 0.121 233.4)
- #D88852
#D88852
oklch(69.9% 0.12 53.5)
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 #40AADD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.052
- Deep Sky Blue #00BFFF ΔE 0.065
- Greyblue #77A1B5 ΔE 0.068
- Chefchaouen Blue #4895EF ΔE 0.069
- Cornflower Blue #6495ED ΔE 0.071
- Dark Sky Blue #448EE4 ΔE 0.081
- Bluegrey #85A3B2 ΔE 0.081
- Faded Blue #658CBB ΔE 0.086
Use #40AADD 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.