#599EC6
Closest named color: Greyblue (#77A1B5). oklch(67% 0.092 235.8), rgb(89, 158, 198).
Aa
Black text reads best on this color (7.13:1).
About this color
#599EC6 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.092 and its hue 236°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.042 away. Black text reads best on it, at 7.13:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.13:1 |
| White text | 2.94:1 |
Values
| HEX | #599EC6 |
| RGB | rgb(89, 158, 198) |
| HSL | hsl(202, 49%, 56%) |
| OKLCH | oklch(67% 0.092 235.8) |
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 #599EC6 | 2.94:1 | Fails | Lc -61.1 | Content text, not long reading |
| Black text on #599EC6 | 7.13:1 | AAA | Lc 48.3 | Large or bold text, headings |
| #599EC6 text on white | 2.94:1 | Fails | Lc 55.8 | Large or bold text, headings |
| #599EC6 text on black | 7.13:1 | AAA | Lc -46.0 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF4
oklch(93.6% 0.017 236.7)
-
Step 200
200
#C6DDEC
oklch(88.5% 0.032 236.4)
-
Step 300
300
#9EC7E1
oklch(80.9% 0.057 236.2)
-
Step 400
400 (this color)
#599EC6
oklch(67% 0.092 235.8)
-
Step 500
500
#3093C6
oklch(63% 0.117 235.9)
-
Step 600
600
#007DAF
oklch(55.7% 0.119 235.4)
-
Step 700
700
#006994
oklch(49.2% 0.105 235.5)
-
Step 800
800
#00567A
oklch(42.8% 0.091 235.4)
-
Step 900
900
#084764
oklch(37.6% 0.076 235.5)
-
Step 950
950
#0A2A3B
oklch(27.1% 0.048 236)
#599EC6 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) | #8B9DC8 | 0.056 |
| Deuteranopia (no green cones) | #7C91C5 | 0.049 |
| Tritanopia (no blue cones) | #00A8AB | 0.071 |
| Achromatopsia (no color) | #969696 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599EC6
#599EC6
oklch(67% 0.092 235.8)
- #C1865D
#C1865D
oklch(67% 0.092 55.3)
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 #599EC6, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.042
- Faded Blue #658CBB ΔE 0.049
- Cadet Blue #5F9EA0 ΔE 0.058
- Silver Lake Blue #778DA9 ΔE 0.058
- Bluegrey #85A3B2 ΔE 0.059
- Bluey Grey #89A0B0 ΔE 0.062
- Blue Grey #758DA3 ΔE 0.062
- Turquoise Blue #06B1C4 ΔE 0.062
Use #599EC6 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.