#05B5FD
Closest named color: Deep Sky Blue (#00BFFF). oklch(73.2% 0.157 236.2), rgb(5, 181, 253).
Aa
Black text reads best on this color (9.03:1).
About this color
#05B5FD is a medium-light, vivid blue. In OKLCH its lightness is 73%, its chroma 0.157 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.027 away. Black text reads best on it, at 9.03:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | vivid (0.157) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.03:1 |
| White text | 2.32:1 |
Values
| HEX | #05B5FD |
| RGB | rgb(5, 181, 253) |
| HSL | hsl(197, 98%, 51%) |
| OKLCH | oklch(73.2% 0.157 236.2) |
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 #05B5FD | 2.32:1 | Fails | Lc -50.0 | Large or bold text, headings |
| Black text on #05B5FD | 9.03:1 | AAA | Lc 58.8 | Large or bold text, headings |
| #05B5FD text on white | 2.32:1 | Fails | Lc 45.1 | Large or bold text, headings |
| #05B5FD text on black | 9.03:1 | AAA | Lc -57.0 | 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
#EEF7FD
oklch(97.1% 0.013 236.6)
-
Step 100
100
#D9EDFB
oklch(93.6% 0.028 238.2)
-
Step 200
200
#B8DFF9
oklch(88.4% 0.054 237.4)
-
Step 300
300
#80CBF8
oklch(81% 0.098 236.1)
-
Step 400
400 (this color)
#05B5FD
oklch(73.2% 0.157 236.2)
-
Step 500
500
#0094D0
oklch(63.1% 0.136 236.2)
-
Step 600
600
#007CB0
oklch(55.5% 0.121 236.7)
-
Step 700
700
#006894
oklch(49% 0.106 236.4)
-
Step 800
800
#00557A
oklch(42.5% 0.092 236.4)
-
Step 900
900
#004767
oklch(37.7% 0.082 236.6)
-
Step 950
950
#002A3F
oklch(27% 0.059 236.5)
#05B5FD 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) | #92B5FF | 0.090 |
| Deuteranopia (no green cones) | #74A1FC | 0.073 |
| Tritanopia (no blue cones) | #00C8CE | 0.099 |
| Achromatopsia (no color) | #AAAAAA | 0.157 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #05B5FD
#05B5FD
oklch(73.2% 0.157 236.2)
- #F18A33
#F18A33
oklch(73.1% 0.158 56.1)
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 #05B5FD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.027
- Bright Sky Blue #02CCFE ΔE 0.064
- Vivid Sky Blue #4CC9F0 ΔE 0.071
- Carolina Blue #8AB8FE ΔE 0.082
- Chefchaouen Blue #4895EF ΔE 0.083
- Turquoise Blue #06B1C4 ΔE 0.084
- Cornflower Blue #6495ED ΔE 0.088
- Lightblue #7BC8F6 ΔE 0.089
Use #05B5FD 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.