#599CD0
Closest named color: Faded Blue (#658CBB). oklch(67% 0.103 243.6), rgb(89, 156, 208).
Aa
Black text reads best on this color (7.09:1).
About this color
#599CD0 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.103 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.047 away. Black text reads best on it, at 7.09:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 7.09:1 |
| White text | 2.96:1 |
Values
| HEX | #599CD0 |
| RGB | rgb(89, 156, 208) |
| HSL | hsl(206, 56%, 58%) |
| OKLCH | oklch(67% 0.103 243.6) |
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 #599CD0 | 2.96:1 | Fails | Lc -61.3 | Content text, not long reading |
| Black text on #599CD0 | 7.09:1 | AAA | Lc 48.1 | Large or bold text, headings |
| #599CD0 text on white | 2.96:1 | Fails | Lc 56.0 | Large or bold text, headings |
| #599CD0 text on black | 7.09:1 | AAA | Lc -45.8 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0ECF6
oklch(93.7% 0.019 243)
-
Step 200
200
#C6DCF0
oklch(88.4% 0.036 245.7)
-
Step 300
300
#9DC6E8
oklch(80.9% 0.065 243.7)
-
Step 400
400 (this color)
#599CD0
oklch(67% 0.103 243.6)
-
Step 500
500
#3291D3
oklch(63.2% 0.132 243.5)
-
Step 600
600
#0079BC
oklch(55.5% 0.136 243.9)
-
Step 700
700
#00669F
oklch(49.1% 0.12 243.6)
-
Step 800
800
#005383
oklch(42.6% 0.105 243.8)
-
Step 900
900
#0A456B
oklch(37.6% 0.086 243.7)
-
Step 950
950
#0A293F
oklch(27.1% 0.054 243.5)
#599CD0 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) | #859DD2 | 0.049 |
| Deuteranopia (no green cones) | #7591CF | 0.039 |
| Tritanopia (no blue cones) | #00A9AE | 0.084 |
| Achromatopsia (no color) | #969696 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599CD0
#599CD0
oklch(67% 0.103 243.6)
- #C2874D
#C2874D
oklch(67.1% 0.104 63.9)
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 #599CD0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.047
- Cornflower Blue #6495ED ΔE 0.053
- Greyblue #77A1B5 ΔE 0.055
- Chefchaouen Blue #4895EF ΔE 0.056
- Dark Sky Blue #448EE4 ΔE 0.059
- Silver Lake Blue #778DA9 ΔE 0.065
- Blue Grey #758DA3 ΔE 0.071
- Dusty Blue #5A86AD ΔE 0.071
Use #599CD0 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.