#5599C8
Closest named color: Faded Blue (#658CBB). oklch(65.7% 0.099 240.7), rgb(85, 153, 200).
Aa
Black text reads best on this color (6.77:1).
About this color
#5599C8 is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.099 and its hue 241°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.037 away. Black text reads best on it, at 6.77:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.77:1 |
| White text | 3.09:1 |
Values
| HEX | #5599C8 |
| RGB | rgb(85, 153, 200) |
| HSL | hsl(205, 51%, 56%) |
| OKLCH | oklch(65.7% 0.099 240.7) |
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 #5599C8 | 3.09:1 | AA large text | Lc -63.2 | Content text, not long reading |
| Black text on #5599C8 | 6.77:1 | AA | Lc 46.3 | Large or bold text, headings |
| #5599C8 text on white | 3.09:1 | AA large text | Lc 57.8 | Large or bold text, headings |
| #5599C8 text on black | 6.77:1 | AA | Lc -44.0 | 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
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF2
oklch(93.5% 0.014 241)
-
Step 200
200
#CADCEA
oklch(88.5% 0.027 241.2)
-
Step 300
300
#A5C5DD
oklch(80.8% 0.048 240.6)
-
Step 400
400
#74A7CC
oklch(70.6% 0.077 240.7)
-
Step 500
500 (this color)
#5599C8
oklch(65.7% 0.099 240.7)
-
Step 600
600
#2C7AAC
oklch(55.5% 0.108 241)
-
Step 700
700
#1E6794
oklch(49.2% 0.1 240.9)
-
Step 800
800
#1C5478
oklch(42.7% 0.083 241.1)
-
Step 900
900
#1D4660
oklch(37.8% 0.064 239.4)
-
Step 950
950
#122938
oklch(27% 0.04 239.2)
#5599C8 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) | #8499CA | 0.052 |
| Deuteranopia (no green cones) | #748DC7 | 0.043 |
| Tritanopia (no blue cones) | #00A5A9 | 0.078 |
| Achromatopsia (no color) | #929292 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5599C8
#5599C8
oklch(65.7% 0.099 240.7)
- #BD8350
#BD8350
oklch(65.8% 0.098 61.1)
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 #5599C8, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.037
- Greyblue #77A1B5 ΔE 0.055
- Silver Lake Blue #778DA9 ΔE 0.056
- Dusty Blue #5A86AD ΔE 0.058
- Dark Sky Blue #448EE4 ΔE 0.060
- Blue Grey #758DA3 ΔE 0.061
- Cool Blue #4984B8 ΔE 0.062
- Cornflower Blue #6495ED ΔE 0.063
Use #5599C8 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.