#5BB1DD
Closest named color: Turquoise Blue (#06B1C4). oklch(72.4% 0.105 233.1), rgb(91, 177, 221).
Aa
Black text reads best on this color (8.77:1).
About this color
#5BB1DD is a medium-light, moderately saturated blue. In OKLCH its lightness is 72%, its chroma 0.105 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.057 away. Black text reads best on it, at 8.77:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.105) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.77:1 |
| White text | 2.39:1 |
Values
| HEX | #5BB1DD |
| RGB | rgb(91, 177, 221) |
| HSL | hsl(200, 66%, 61%) |
| OKLCH | oklch(72.4% 0.105 233.1) |
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 #5BB1DD | 2.39:1 | Fails | Lc -51.9 | Large or bold text, headings |
| Black text on #5BB1DD | 8.77:1 | AAA | Lc 57.1 | Large or bold text, headings |
| #5BB1DD text on white | 2.39:1 | Fails | Lc 46.9 | Large or bold text, headings |
| #5BB1DD text on black | 8.77:1 | AAA | Lc -55.1 | 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
#F0F7FA
oklch(97.2% 0.008 225.1)
-
Step 100
100
#DEECF5
oklch(93.5% 0.019 235.7)
-
Step 200
200
#C2DEEE
oklch(88.5% 0.037 232.9)
-
Step 300
300
#97C9E4
oklch(81% 0.065 232.2)
-
Step 400
400 (this color)
#5BB1DD
oklch(72.4% 0.105 233.1)
-
Step 500
500
#0095CB
oklch(63% 0.131 233.2)
-
Step 600
600
#007DAB
oklch(55.5% 0.115 233.2)
-
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
#012A3D
oklch(26.9% 0.056 234.3)
#5BB1DD 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) | #9CAFDF | 0.069 |
| Deuteranopia (no green cones) | #89A2DC | 0.058 |
| Tritanopia (no blue cones) | #00BDC0 | 0.073 |
| Achromatopsia (no color) | #A7A7A7 | 0.105 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BB1DD
#5BB1DD
oklch(72.4% 0.105 233.1)
- #DA9366
#DA9366
oklch(72.4% 0.105 52.7)
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 #5BB1DD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.057
- Deep Sky Blue #00BFFF ΔE 0.058
- Greyblue #77A1B5 ΔE 0.064
- Vivid Sky Blue #4CC9F0 ΔE 0.064
- Bluegrey #85A3B2 ΔE 0.070
- Carolina Blue #8AB8FE ΔE 0.072
- Lightblue #7BC8F6 ΔE 0.076
- Bluey Grey #89A0B0 ΔE 0.077
Use #5BB1DD 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.