#4599CF
Closest named color: Faded Blue (#658CBB). oklch(65.4% 0.114 240), rgb(69, 153, 207).
Aa
Black text reads best on this color (6.71:1).
About this color
#4599CF is a medium-light, moderately saturated blue. In OKLCH its lightness is 65%, its chroma 0.114 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.045 away. Black text reads best on it, at 6.71:1.
| Hue family | Blues |
| Lightness | medium-light (65%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.71:1 |
| White text | 3.12:1 |
Values
| HEX | #4599CF |
| RGB | rgb(69, 153, 207) |
| HSL | hsl(203, 59%, 54%) |
| OKLCH | oklch(65.4% 0.114 240) |
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 #4599CF | 3.12:1 | AA large text | Lc -63.5 | Content text, not long reading |
| Black text on #4599CF | 6.71:1 | AA | Lc 46.0 | Large or bold text, headings |
| #4599CF text on white | 3.12:1 | AA large text | Lc 58.1 | Large or bold text, headings |
| #4599CF text on black | 6.71:1 | AA | Lc -43.7 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1ECF4
oklch(93.7% 0.016 239.1)
-
Step 200
200
#C8DCEC
oklch(88.4% 0.031 242)
-
Step 300
300
#A1C6E2
oklch(80.9% 0.056 241)
-
Step 400
400
#6BA8D3
oklch(70.7% 0.089 240.4)
-
Step 500
500 (this color)
#4599CF
oklch(65.4% 0.114 240)
-
Step 600
600
#0C7BB4
oklch(55.6% 0.124 240)
-
Step 700
700
#006799
oklch(49% 0.112 240)
-
Step 800
800
#05547E
oklch(42.6% 0.097 240.7)
-
Step 900
900
#134665
oklch(37.7% 0.075 240.2)
-
Step 950
950
#0D293B
oklch(26.9% 0.047 240.1)
#4599CF 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) | #8099D1 | 0.060 |
| Deuteranopia (no green cones) | #6D8CCE | 0.048 |
| Tritanopia (no blue cones) | #00A7AC | 0.081 |
| Achromatopsia (no color) | #929292 | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #4599CF
#4599CF
oklch(65.4% 0.114 240)
- #C37E42
#C37E42
oklch(65.4% 0.114 59.7)
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 #4599CF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.045
- Dark Sky Blue #448EE4 ΔE 0.049
- Chefchaouen Blue #4895EF ΔE 0.053
- Cornflower Blue #6495ED ΔE 0.058
- Cool Blue #4984B8 ΔE 0.061
- Water Blue #0E87CC ΔE 0.062
- Dusty Blue #5A86AD ΔE 0.064
- Off Blue #5684AE ΔE 0.067
Use #4599CF 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.