#599FD2
Closest named color: Greyblue (#77A1B5). oklch(67.8% 0.104 242.1), rgb(89, 159, 210).
Aa
Black text reads best on this color (7.31:1).
About this color
#599FD2 is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.104 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.053 away. Black text reads best on it, at 7.31:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.31:1 |
| White text | 2.87:1 |
Values
| HEX | #599FD2 |
| RGB | rgb(89, 159, 210) |
| HSL | hsl(205, 57%, 59%) |
| OKLCH | oklch(67.8% 0.104 242.1) |
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 #599FD2 | 2.87:1 | Fails | Lc -60.0 | Content text, not long reading |
| Black text on #599FD2 | 7.31:1 | AAA | Lc 49.3 | Large or bold text, headings |
| #599FD2 text on white | 2.87:1 | Fails | Lc 54.7 | Large or bold text, headings |
| #599FD2 text on black | 7.31:1 | AAA | Lc -47.1 | 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
#DFECF6
oklch(93.6% 0.019 240.7)
-
Step 200
200
#C5DDEF
oklch(88.5% 0.036 240.3)
-
Step 300
300
#9CC6E7
oklch(80.8% 0.065 242.2)
-
Step 400
400 (this color)
#599FD2
oklch(67.8% 0.104 242.1)
-
Step 500
500
#2C91D2
oklch(63% 0.133 242.2)
-
Step 600
600
#007AB9
oklch(55.5% 0.132 242.1)
-
Step 700
700
#00679D
oklch(49.2% 0.117 242)
-
Step 800
800
#005481
oklch(42.7% 0.101 241.9)
-
Step 900
900
#05466B
oklch(37.7% 0.086 241.7)
-
Step 950
950
#08293F
oklch(27% 0.055 242.5)
#599FD2 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) | #889FD4 | 0.052 |
| Deuteranopia (no green cones) | #7893D1 | 0.043 |
| Tritanopia (no blue cones) | #00ACB0 | 0.083 |
| Achromatopsia (no color) | #989898 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599FD2
#599FD2
oklch(67.8% 0.104 242.1)
- #C58851
#C58851
oklch(67.6% 0.103 61.7)
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 #599FD2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.053
- Faded Blue #658CBB ΔE 0.055
- Cornflower Blue #6495ED ΔE 0.055
- Chefchaouen Blue #4895EF ΔE 0.059
- Dark Sky Blue #448EE4 ΔE 0.064
- Bluegrey #85A3B2 ΔE 0.068
- Turquoise Blue #06B1C4 ΔE 0.069
- Silver Lake Blue #778DA9 ΔE 0.070
Use #599FD2 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.