#05BBFB
Closest named color: Deep Sky Blue (#00BFFF). oklch(74.4% 0.152 232.3), rgb(5, 187, 251).
Aa
Black text reads best on this color (9.50:1).
About this color
#05BBFB is a medium-light, vivid blue. In OKLCH its lightness is 74%, its chroma 0.152 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.011 away. Black text reads best on it, at 9.50:1.
| Hue family | Blues |
| Lightness | medium-light (74%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.50:1 |
| White text | 2.20:1 |
Values
| HEX | #05BBFB |
| RGB | rgb(5, 187, 251) |
| HSL | hsl(196, 97%, 50%) |
| OKLCH | oklch(74.4% 0.152 232.3) |
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 #05BBFB | 2.20:1 | Fails | Lc -47.5 | Large or bold text, headings |
| Black text on #05BBFB | 9.50:1 | AAA | Lc 61.2 | Content text, not long reading |
| #05BBFB text on white | 2.20:1 | Fails | Lc 42.8 | Non-text elements, placeholder text |
| #05BBFB text on black | 9.50:1 | AAA | Lc -59.4 | 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
#EEF7FD
oklch(97.1% 0.013 236.6)
-
Step 100
100
#D9EEF9
oklch(93.7% 0.027 230.4)
-
Step 200
200
#B7E0F6
oklch(88.5% 0.053 231.5)
-
Step 300
300
#7FCCF4
oklch(81% 0.095 232.3)
-
Step 400
400 (this color)
#05BBFB
oklch(74.4% 0.152 232.3)
-
Step 500
500
#0096CA
oklch(63.2% 0.129 232.1)
-
Step 600
600
#007EAA
oklch(55.7% 0.113 231.8)
-
Step 700
700
#006990
oklch(49% 0.101 232.9)
-
Step 800
800
#005676
oklch(42.6% 0.087 232.3)
-
Step 900
900
#004863
oklch(37.7% 0.077 231.8)
-
Step 950
950
#002B3D
oklch(27.1% 0.055 231.9)
#05BBFB 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) | #9BB9FE | 0.098 |
| Deuteranopia (no green cones) | #7EA6FA | 0.081 |
| Tritanopia (no blue cones) | #00CCD1 | 0.089 |
| Achromatopsia (no color) | #AEAEAE | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #05BBFB
#05BBFB
oklch(74.4% 0.152 232.3)
- #F68E47
#F68E47
oklch(74.6% 0.152 52.4)
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 #05BBFB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.011
- Bright Sky Blue #02CCFE ΔE 0.047
- Vivid Sky Blue #4CC9F0 ΔE 0.054
- Lightblue #7BC8F6 ΔE 0.076
- Carolina Blue #8AB8FE ΔE 0.078
- Turquoise Blue #06B1C4 ΔE 0.081
- Sky #82CAFC ΔE 0.085
- Aqua Blue #02D8E9 ΔE 0.092
Use #05BBFB 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.