#5B99BA
Closest named color: Faded Blue (#658CBB). oklch(65.4% 0.081 233.1), rgb(91, 153, 186).
Aa
Black text reads best on this color (6.71:1).
About this color
#5B99BA is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.081 and its hue 233°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.038 away. Black text reads best on it, at 6.71:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.081) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.71:1 |
| White text | 3.12:1 |
Values
| HEX | #5B99BA |
| RGB | rgb(91, 153, 186) |
| HSL | hsl(201, 41%, 54%) |
| OKLCH | oklch(65.4% 0.081 233.1) |
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 #5B99BA | 3.12:1 | AA large text | Lc -63.6 | Content text, not long reading |
| Black text on #5B99BA | 6.71:1 | AA | Lc 45.8 | Large or bold text, headings |
| #5B99BA text on white | 3.12:1 | AA large text | Lc 58.2 | Large or bold text, headings |
| #5B99BA text on black | 6.71:1 | AA | Lc -43.5 | Non-text elements, placeholder text |
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
#E3EBF0
oklch(93.5% 0.011 234.8)
-
Step 200
200
#CCDCE6
oklch(88.5% 0.022 235)
-
Step 300
300
#A8C6D6
oklch(81% 0.039 231.2)
-
Step 400
400
#79A8C2
oklch(70.7% 0.063 233)
-
Step 500
500 (this color)
#5B99BA
oklch(65.4% 0.081 233.1)
-
Step 600
600
#367C9E
oklch(55.6% 0.087 232.5)
-
Step 700
700
#286888
oklch(49.1% 0.082 233.8)
-
Step 800
800
#23556E
oklch(42.7% 0.067 233.2)
-
Step 900
900
#224659
oklch(37.6% 0.053 233.6)
-
Step 950
950
#152934
oklch(26.9% 0.033 233.9)
#5B99BA 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) | #8997BC | 0.054 |
| Deuteranopia (no green cones) | #7C8DBA | 0.047 |
| Tritanopia (no blue cones) | #26A2A4 | 0.061 |
| Achromatopsia (no color) | #929292 | 0.081 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5B99BA
#5B99BA
oklch(65.4% 0.081 233.1)
- #B88361
#B88361
oklch(65.5% 0.081 53.5)
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 #5B99BA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.038
- Greyblue #77A1B5 ΔE 0.042
- Silver Lake Blue #778DA9 ΔE 0.043
- Blue Grey #758DA3 ΔE 0.045
- Cadet Blue #5F9EA0 ΔE 0.046
- Dusty Blue #5A86AD ΔE 0.053
- Cool Gray #8D99AE ΔE 0.060
- Off Blue #5684AE ΔE 0.060
Use #5B99BA 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.