#27ADE5
Closest named color: Deep Sky Blue (#00BFFF). oklch(70.4% 0.135 232.3), rgb(39, 173, 229).
Aa
Black text reads best on this color (8.19:1).
About this color
#27ADE5 is a medium-light, moderately saturated blue. In OKLCH its lightness is 70%, its chroma 0.135 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.054 away. Black text reads best on it, at 8.19:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | moderately saturated (0.135) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 8.19:1 |
| White text | 2.56:1 |
Values
| HEX | #27ADE5 |
| RGB | rgb(39, 173, 229) |
| HSL | hsl(198, 79%, 53%) |
| OKLCH | oklch(70.4% 0.135 232.3) |
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 #27ADE5 | 2.56:1 | Fails | Lc -54.8 | Large or bold text, headings |
| Black text on #27ADE5 | 8.19:1 | AAA | Lc 54.3 | Large or bold text, headings |
| #27ADE5 text on white | 2.56:1 | Fails | Lc 49.7 | Large or bold text, headings |
| #27ADE5 text on black | 8.19:1 | AAA | Lc -52.3 | 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
#EEF7FC
oklch(97.1% 0.012 231.7)
-
Step 100
100
#DBEDF8
oklch(93.6% 0.024 234.4)
-
Step 200
200
#BBDFF3
oklch(88.4% 0.047 232.3)
-
Step 300
300
#88CBEE
oklch(81% 0.084 232)
-
Step 400
400 (this color)
#27ADE5
oklch(70.4% 0.135 232.3)
-
Step 500
500
#0095CA
oklch(63% 0.13 232.7)
-
Step 600
600
#007EAA
oklch(55.7% 0.113 231.8)
-
Step 700
700
#006990
oklch(49% 0.101 232.9)
-
Step 800
800
#005677
oklch(42.6% 0.088 233.1)
-
Step 900
900
#004863
oklch(37.7% 0.077 231.8)
-
Step 950
950
#002B3D
oklch(27.1% 0.055 231.9)
#27ADE5 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 | 0.088 |
| Deuteranopia (no green cones) | #789AE4 | 0.073 |
| Tritanopia (no blue cones) | #00BCC0 | 0.080 |
| Achromatopsia (no color) | #A2A2A2 | 0.135 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #27ADE5
#27ADE5
oklch(70.4% 0.135 232.3)
- #E08549
#E08549
oklch(70.3% 0.135 52.2)
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 #27ADE5, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.054
- Turquoise Blue #06B1C4 ΔE 0.056
- Chefchaouen Blue #4895EF ΔE 0.071
- Cornflower Blue #6495ED ΔE 0.076
- Vivid Sky Blue #4CC9F0 ΔE 0.082
- Greyblue #77A1B5 ΔE 0.083
- Dark Sky Blue #448EE4 ΔE 0.084
- Bright Sky Blue #02CCFE ΔE 0.084
Use #27ADE5 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.