#5B9FBB
Closest named color: Greyblue (#77A1B5). oklch(66.8% 0.08 226.7), rgb(91, 159, 187).
Aa
Black text reads best on this color (7.12:1).
About this color
#5B9FBB is a medium-light, moderately saturated teal or cyan. In OKLCH its lightness is 67%, its chroma 0.080 and its hue 227°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.031 away. Black text reads best on it, at 7.12:1.
| Hue family | Teals and cyans |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.080) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.12:1 |
| White text | 2.94:1 |
Values
| HEX | #5B9FBB |
| RGB | rgb(91, 159, 187) |
| HSL | hsl(197, 41%, 55%) |
| OKLCH | oklch(66.8% 0.08 226.7) |
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 #5B9FBB | 2.94:1 | Fails | Lc -61.2 | Content text, not long reading |
| Black text on #5B9FBB | 7.12:1 | AAA | Lc 48.2 | Large or bold text, headings |
| #5B9FBB text on white | 2.94:1 | Fails | Lc 55.9 | Large or bold text, headings |
| #5B9FBB text on black | 7.12:1 | AAA | Lc -45.9 | 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 500.
-
Step 50
50
#F2F6F8
oklch(97.1% 0.005 228.8)
-
Step 100
100
#E2ECF0
oklch(93.7% 0.012 223.5)
-
Step 200
200
#CBDCE4
oklch(88.4% 0.021 227.6)
-
Step 300
300
#A7C6D4
oklch(80.8% 0.039 226.9)
-
Step 400
400
#76A9BF
oklch(70.7% 0.063 226.7)
-
Step 500
500 (this color)
#5B9FBB
oklch(66.8% 0.08 226.7)
-
Step 600
600
#2F7D9B
oklch(55.5% 0.088 227.2)
-
Step 700
700
#216A84
oklch(49.2% 0.081 226.1)
-
Step 800
800
#1E566B
oklch(42.6% 0.067 226.6)
-
Step 900
900
#1F4757
oklch(37.6% 0.052 226.9)
-
Step 950
950
#132A33
oklch(27.1% 0.033 225.6)
#5B9FBB 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) | #909CBC | 0.061 |
| Deuteranopia (no green cones) | #8292BB | 0.054 |
| Tritanopia (no blue cones) | #22A7A8 | 0.056 |
| Achromatopsia (no color) | #969696 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B9FBB
#5B9FBB
oklch(66.8% 0.08 226.7)
- #BE856A
#BE856A
oklch(66.7% 0.08 46.2)
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 #5B9FBB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.031
- Cadet Blue #5F9EA0 ΔE 0.040
- Bluegrey #85A3B2 ΔE 0.050
- Bluey Grey #89A0B0 ΔE 0.053
- Silver Lake Blue #778DA9 ΔE 0.054
- Faded Blue #658CBB ΔE 0.054
- Blue Grey #758DA3 ΔE 0.055
- Turquoise Blue #06B1C4 ΔE 0.057
Use #5B9FBB 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.