#599ECC
Closest named color: Greyblue (#77A1B5). oklch(67.2% 0.098 239.6), rgb(89, 158, 204).
Aa
Black text reads best on this color (7.18:1).
About this color
#599ECC is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.098 and its hue 240°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.048 away. Black text reads best on it, at 7.18:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.18:1 |
| White text | 2.92:1 |
Values
| HEX | #599ECC |
| RGB | rgb(89, 158, 204) |
| HSL | hsl(204, 53%, 57%) |
| OKLCH | oklch(67.2% 0.098 239.6) |
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 #599ECC | 2.92:1 | Fails | Lc -60.8 | Content text, not long reading |
| Black text on #599ECC | 7.18:1 | AAA | Lc 48.6 | Large or bold text, headings |
| #599ECC text on white | 2.92:1 | Fails | Lc 55.5 | Large or bold text, headings |
| #599ECC text on black | 7.18:1 | AAA | Lc -46.3 | 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
#E0ECF5
oklch(93.7% 0.018 240)
-
Step 200
200
#C6DDEE
oklch(88.6% 0.034 239.9)
-
Step 300
300
#9DC7E5
oklch(81% 0.062 239.6)
-
Step 400
400 (this color)
#599ECC
oklch(67.2% 0.098 239.6)
-
Step 500
500
#2F92CD
oklch(63.1% 0.126 239.9)
-
Step 600
600
#007BB5
oklch(55.6% 0.127 239.8)
-
Step 700
700
#006799
oklch(49% 0.112 240)
-
Step 800
800
#00557E
oklch(42.8% 0.097 239.2)
-
Step 900
900
#084668
oklch(37.6% 0.082 240.1)
-
Step 950
950
#09293D
oklch(26.9% 0.052 240.5)
#599ECC 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) | #899ECE | 0.054 |
| Deuteranopia (no green cones) | #7A92CB | 0.045 |
| Tritanopia (no blue cones) | #00AAAD | 0.078 |
| Achromatopsia (no color) | #979797 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599ECC
#599ECC
oklch(67.2% 0.098 239.6)
- #C28756
#C28756
oklch(67.2% 0.097 59.8)
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 #599ECC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.048
- Faded Blue #658CBB ΔE 0.050
- Cornflower Blue #6495ED ΔE 0.062
- Silver Lake Blue #778DA9 ΔE 0.063
- Bluegrey #85A3B2 ΔE 0.064
- Chefchaouen Blue #4895EF ΔE 0.065
- Turquoise Blue #06B1C4 ΔE 0.066
- Bluey Grey #89A0B0 ΔE 0.066
Use #599ECC 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.