#5B9FCD
Closest named color: Greyblue (#77A1B5). oklch(67.6% 0.097 239.9), rgb(91, 159, 205).
Aa
Black text reads best on this color (7.28:1).
About this color
#5B9FCD is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.097 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.046 away. Black text reads best on it, at 7.28:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.28:1 |
| White text | 2.88:1 |
Values
| HEX | #5B9FCD |
| RGB | rgb(91, 159, 205) |
| HSL | hsl(204, 53%, 58%) |
| OKLCH | oklch(67.6% 0.097 239.9) |
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 #5B9FCD | 2.88:1 | Fails | Lc -60.2 | Content text, not long reading |
| Black text on #5B9FCD | 7.28:1 | AAA | Lc 49.1 | Large or bold text, headings |
| #5B9FCD text on white | 2.88:1 | Fails | Lc 54.9 | Large or bold text, headings |
| #5B9FCD text on black | 7.28:1 | AAA | Lc -46.9 | 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 400.
-
Step 50
50
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF5
oklch(93.7% 0.018 240)
-
Step 200
200
#C6DDEE
oklch(88.6% 0.034 239.9)
-
Step 300
300
#9DC7E4
oklch(80.9% 0.061 238.6)
-
Step 400
400 (this color)
#5B9FCD
oklch(67.6% 0.097 239.9)
-
Step 500
500
#3192CD
oklch(63.1% 0.125 240.2)
-
Step 600
600
#007BB5
oklch(55.6% 0.127 239.8)
-
Step 700
700
#006799
oklch(49% 0.112 240)
-
Step 800
800
#00557F
oklch(42.8% 0.098 239.8)
-
Step 900
900
#094668
oklch(37.6% 0.081 240.2)
-
Step 950
950
#0A293D
oklch(26.9% 0.052 241)
#5B9FCD 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) | #8A9FCF | 0.053 |
| Deuteranopia (no green cones) | #7B93CC | 0.044 |
| Tritanopia (no blue cones) | #00ABAE | 0.079 |
| Achromatopsia (no color) | #989898 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B9FCD
#5B9FCD
oklch(67.6% 0.097 239.9)
- #C38857
#C38857
oklch(67.5% 0.097 59.8)
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 #5B9FCD, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.046
- Faded Blue #658CBB ΔE 0.053
- Cornflower Blue #6495ED ΔE 0.062
- Bluegrey #85A3B2 ΔE 0.062
- Bluey Grey #89A0B0 ΔE 0.065
- Silver Lake Blue #778DA9 ΔE 0.065
- Turquoise Blue #06B1C4 ΔE 0.066
- Chefchaouen Blue #4895EF ΔE 0.066
Use #5B9FCD 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.