#599DC7
Closest named color: Greyblue (#77A1B5). oklch(66.8% 0.093 237.5), rgb(89, 157, 199).
Aa
Black text reads best on this color (7.07:1).
About this color
#599DC7 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.093 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.044 away. Black text reads best on it, at 7.07:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.093) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.07:1 |
| White text | 2.96:1 |
Values
| HEX | #599DC7 |
| RGB | rgb(89, 157, 199) |
| HSL | hsl(203, 50%, 56%) |
| OKLCH | oklch(66.8% 0.093 237.5) |
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 #599DC7 | 2.96:1 | Fails | Lc -61.5 | Content text, not long reading |
| Black text on #599DC7 | 7.07:1 | AAA | Lc 47.9 | Large or bold text, headings |
| #599DC7 text on white | 2.96:1 | Fails | Lc 56.1 | Large or bold text, headings |
| #599DC7 text on black | 7.07:1 | AAA | Lc -45.7 | 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
#74A8C9
oklch(70.7% 0.073 237)
-
Step 500
500 (this color)
#599DC7
oklch(66.8% 0.093 237.5)
-
Step 600
600
#2D7BA7
oklch(55.5% 0.101 237.5)
-
Step 700
700
#1F688F
oklch(49.2% 0.093 237)
-
Step 800
800
#1C5574
oklch(42.8% 0.077 236.7)
-
Step 900
900
#1E465E
oklch(37.7% 0.061 237.7)
-
Step 950
950
#132937
oklch(27% 0.038 238.3)
#599DC7 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) | #8A9CC9 | 0.055 |
| Deuteranopia (no green cones) | #7B91C6 | 0.046 |
| Tritanopia (no blue cones) | #00A8AB | 0.074 |
| Achromatopsia (no color) | #969696 | 0.093 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599DC7
#599DC7
oklch(66.8% 0.093 237.5)
- #C0865A
#C0865A
oklch(66.8% 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 #599DC7, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.044
- Faded Blue #658CBB ΔE 0.046
- Silver Lake Blue #778DA9 ΔE 0.058
- Cadet Blue #5F9EA0 ΔE 0.060
- Bluegrey #85A3B2 ΔE 0.062
- Blue Grey #758DA3 ΔE 0.062
- Bluey Grey #89A0B0 ΔE 0.064
- Cool Gray #8D99AE ΔE 0.065
Use #599DC7 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.