#5BB3E7
Closest named color: Deep Sky Blue (#00BFFF). oklch(73.3% 0.113 237), rgb(91, 179, 231).
Aa
Black text reads best on this color (9.04:1).
About this color
#5BB3E7 is a medium-light, moderately saturated blue. In OKLCH its lightness is 73%, its chroma 0.113 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sky Blue (#00BFFF), ΔE 0.047 away. Black text reads best on it, at 9.04:1.
| Hue family | Blues |
| Lightness | medium-light (73%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Deep Sky Blue (#00BFFF) |
| Black text | 9.04:1 |
| White text | 2.32:1 |
Values
| HEX | #5BB3E7 |
| RGB | rgb(91, 179, 231) |
| HSL | hsl(202, 74%, 63%) |
| OKLCH | oklch(73.3% 0.113 237) |
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 #5BB3E7 | 2.32:1 | Fails | Lc -50.4 | Large or bold text, headings |
| Black text on #5BB3E7 | 9.04:1 | AAA | Lc 58.4 | Large or bold text, headings |
| #5BB3E7 text on white | 2.32:1 | Fails | Lc 45.6 | Large or bold text, headings |
| #5BB3E7 text on black | 9.04:1 | AAA | Lc -56.5 | 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
#F0F7FB
oklch(97.2% 0.009 232.4)
-
Step 100
100
#DEECF6
oklch(93.6% 0.02 238.7)
-
Step 200
200
#C2DEF0
oklch(88.6% 0.039 236.1)
-
Step 300
300
#95C8E9
oklch(80.9% 0.071 237.2)
-
Step 400
400 (this color)
#5BB3E7
oklch(73.3% 0.113 237)
-
Step 500
500
#0094D2
oklch(63.2% 0.138 237.1)
-
Step 600
600
#007CB1
oklch(55.6% 0.122 237.2)
-
Step 700
700
#006895
oklch(49% 0.107 237)
-
Step 800
800
#00557B
oklch(42.6% 0.093 237.2)
-
Step 900
900
#004767
oklch(37.7% 0.082 236.6)
-
Step 950
950
#002A3F
oklch(27% 0.059 236.5)
#5BB3E7 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) | #9BB2E9 | 0.067 |
| Deuteranopia (no green cones) | #87A4E6 | 0.055 |
| Tritanopia (no blue cones) | #00C0C4 | 0.081 |
| Achromatopsia (no color) | #AAAAAA | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BB3E7
#5BB3E7
oklch(73.3% 0.113 237)
- #DF965E
#DF965E
oklch(73.4% 0.114 57.3)
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 #5BB3E7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sky Blue #00BFFF ΔE 0.047
- Vivid Sky Blue #4CC9F0 ΔE 0.058
- Carolina Blue #8AB8FE ΔE 0.061
- Lightblue #7BC8F6 ΔE 0.068
- Bright Sky Blue #02CCFE ΔE 0.069
- Turquoise Blue #06B1C4 ΔE 0.069
- Greyblue #77A1B5 ΔE 0.077
- Sky #82CAFC ΔE 0.078
Use #5BB3E7 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.