#599CC6
Closest named color: Faded Blue (#658CBB). oklch(66.5% 0.093 237.9), rgb(89, 156, 198).
Aa
Black text reads best on this color (6.99:1).
About this color
#599CC6 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.093 and its hue 238°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.043 away. Black text reads best on it, at 6.99:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.99:1 |
| White text | 3.00:1 |
Values
| HEX | #599CC6 |
| RGB | rgb(89, 156, 198) |
| HSL | hsl(203, 49%, 56%) |
| OKLCH | oklch(66.5% 0.093 237.9) |
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 #599CC6 | 3.00:1 | AA large text | Lc -61.9 | Content text, not long reading |
| Black text on #599CC6 | 6.99:1 | AA | Lc 47.5 | Large or bold text, headings |
| #599CC6 text on white | 3.00:1 | AA large text | Lc 56.5 | Large or bold text, headings |
| #599CC6 text on black | 6.99:1 | AA | Lc -45.2 | 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 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
#CADCE8
oklch(88.5% 0.025 236.9)
-
Step 300
300
#A6C6DB
oklch(81% 0.045 236.9)
-
Step 400
400
#75A8C9
oklch(70.8% 0.073 237.5)
-
Step 500
500 (this color)
#599CC6
oklch(66.5% 0.093 237.9)
-
Step 600
600
#2E7BA7
oklch(55.6% 0.101 237.8)
-
Step 700
700
#20688F
oklch(49.2% 0.093 237.2)
-
Step 800
800
#1D5574
oklch(42.8% 0.077 237)
-
Step 900
900
#1E465E
oklch(37.7% 0.061 237.7)
-
Step 950
950
#132937
oklch(27% 0.038 238.3)
#599CC6 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) | #899BC8 | 0.054 |
| Deuteranopia (no green cones) | #7A90C5 | 0.046 |
| Tritanopia (no blue cones) | #00A7AA | 0.074 |
| Achromatopsia (no color) | #959595 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599CC6
#599CC6
oklch(66.5% 0.093 237.9)
- #BF8559
#BF8559
oklch(66.5% 0.093 57.5)
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 #599CC6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.043
- Greyblue #77A1B5 ΔE 0.045
- Silver Lake Blue #778DA9 ΔE 0.056
- Cadet Blue #5F9EA0 ΔE 0.060
- Blue Grey #758DA3 ΔE 0.060
- Bluegrey #85A3B2 ΔE 0.063
- Bluey Grey #89A0B0 ΔE 0.064
- Dusty Blue #5A86AD ΔE 0.065
Use #599CC6 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.