#599ACB
Closest named color: Faded Blue (#658CBB). oklch(66.3% 0.099 242.8), rgb(89, 154, 203).
Aa
Black text reads best on this color (6.90:1).
About this color
#599ACB is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.099 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.040 away. Black text reads best on it, at 6.90:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 6.90:1 |
| White text | 3.03:1 |
Values
| HEX | #599ACB |
| RGB | rgb(89, 154, 203) |
| HSL | hsl(206, 52%, 57%) |
| OKLCH | oklch(66.3% 0.099 242.8) |
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 #599ACB | 3.03:1 | AA large text | Lc -62.4 | Content text, not long reading |
| Black text on #599ACB | 6.90:1 | AA | Lc 47.0 | Large or bold text, headings |
| #599ACB text on white | 3.03:1 | AA large text | Lc 57.0 | Large or bold text, headings |
| #599ACB text on black | 6.90:1 | AA | Lc -44.7 | Non-text elements, placeholder text |
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
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CADCEA
oklch(88.5% 0.027 241.2)
-
Step 300
300
#A6C5DE
oklch(80.9% 0.049 242.6)
-
Step 400
400
#75A7CD
oklch(70.7% 0.077 241.9)
-
Step 500
500 (this color)
#599ACB
oklch(66.3% 0.099 242.8)
-
Step 600
600
#307AAD
oklch(55.7% 0.107 242.5)
-
Step 700
700
#226695
oklch(49.1% 0.101 243.2)
-
Step 800
800
#1E5379
oklch(42.6% 0.084 243.5)
-
Step 900
900
#1F4561
oklch(37.6% 0.065 243)
-
Step 950
950
#132939
oklch(27.1% 0.041 242)
#599ACB 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) | #859ACD | 0.050 |
| Deuteranopia (no green cones) | #758FCA | 0.040 |
| Tritanopia (no blue cones) | #00A6AB | 0.080 |
| Achromatopsia (no color) | #949494 | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599ACB
#599ACB
oklch(66.3% 0.099 242.8)
- #BE8550
#BE8550
oklch(66.3% 0.099 62.7)
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 #599ACB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.040
- Greyblue #77A1B5 ΔE 0.053
- Cornflower Blue #6495ED ΔE 0.058
- Silver Lake Blue #778DA9 ΔE 0.058
- Dark Sky Blue #448EE4 ΔE 0.060
- Chefchaouen Blue #4895EF ΔE 0.060
- Dusty Blue #5A86AD ΔE 0.063
- Blue Grey #758DA3 ΔE 0.064
Use #599ACB 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.