#5BB1DC
Closest named color: Turquoise Blue (#06B1C4). oklch(72.4% 0.104 232.4), rgb(91, 177, 220).
Aa
Black text reads best on this color (8.76:1).
About this color
#5BB1DC is a medium-light, moderately saturated blue. In OKLCH its lightness is 72%, its chroma 0.104 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Turquoise Blue (#06B1C4), ΔE 0.056 away. Black text reads best on it, at 8.76:1.
| Hue family | Blues |
| Lightness | medium-light (72%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Turquoise Blue (#06B1C4) |
| Black text | 8.76:1 |
| White text | 2.39:1 |
Values
| HEX | #5BB1DC |
| RGB | rgb(91, 177, 220) |
| HSL | hsl(200, 65%, 61%) |
| OKLCH | oklch(72.4% 0.104 232.4) |
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 #5BB1DC | 2.39:1 | Fails | Lc -52.0 | Large or bold text, headings |
| Black text on #5BB1DC | 8.76:1 | AAA | Lc 57.0 | Large or bold text, headings |
| #5BB1DC text on white | 2.39:1 | Fails | Lc 47.0 | Large or bold text, headings |
| #5BB1DC text on black | 8.76:1 | AAA | Lc -55.0 | 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
#F0F7FA
oklch(97.2% 0.008 225.1)
-
Step 100
100
#DEECF5
oklch(93.5% 0.019 235.7)
-
Step 200
200
#C3DEED
oklch(88.5% 0.035 232.1)
-
Step 300
300
#97C9E4
oklch(81% 0.065 232.2)
-
Step 400
400 (this color)
#5BB1DC
oklch(72.4% 0.104 232.4)
-
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
#012B3D
oklch(27.2% 0.055 232.4)
#5BB1DC 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) | #9CAFDE | 0.069 |
| Deuteranopia (no green cones) | #8AA2DB | 0.059 |
| Tritanopia (no blue cones) | #00BDBF | 0.073 |
| Achromatopsia (no color) | #A7A7A7 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5BB1DC
#5BB1DC
oklch(72.4% 0.104 232.4)
- #D99367
#D99367
oklch(72.3% 0.103 52.6)
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 #5BB1DC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Turquoise Blue #06B1C4 ΔE 0.056
- Deep Sky Blue #00BFFF ΔE 0.059
- Greyblue #77A1B5 ΔE 0.063
- Vivid Sky Blue #4CC9F0 ΔE 0.064
- Bluegrey #85A3B2 ΔE 0.069
- Carolina Blue #8AB8FE ΔE 0.073
- Bluey Grey #89A0B0 ΔE 0.076
- Lightblue #7BC8F6 ΔE 0.077
Use #5BB1DC 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.