#599BCF
Closest named color: Faded Blue (#658CBB). oklch(66.7% 0.103 244), rgb(89, 155, 207).
Aa
Black text reads best on this color (7.01:1).
About this color
#599BCF is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.103 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Faded Blue (#658CBB), ΔE 0.044 away. Black text reads best on it, at 7.01:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.103) |
| Temperature | cool |
| Nearest name | Faded Blue (#658CBB) |
| Black text | 7.01:1 |
| White text | 2.99:1 |
Values
| HEX | #599BCF |
| RGB | rgb(89, 155, 207) |
| HSL | hsl(206, 55%, 58%) |
| OKLCH | oklch(66.7% 0.103 244) |
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 #599BCF | 2.99:1 | Fails | Lc -61.8 | Content text, not long reading |
| Black text on #599BCF | 7.01:1 | AAA | Lc 47.6 | Large or bold text, headings |
| #599BCF text on white | 2.99:1 | Fails | Lc 56.4 | Large or bold text, headings |
| #599BCF text on black | 7.01:1 | AAA | Lc -45.3 | 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 500.
-
Step 50
50
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CADCEB
oklch(88.6% 0.028 243.1)
-
Step 300
300
#A6C5DF
oklch(80.9% 0.05 243.7)
-
Step 400
400
#74A7D0
oklch(70.8% 0.081 243.5)
-
Step 500
500 (this color)
#599BCF
oklch(66.7% 0.103 244)
-
Step 600
600
#2E79B0
oklch(55.6% 0.112 244.3)
-
Step 700
700
#206697
oklch(49.2% 0.104 243.8)
-
Step 800
800
#1D537A
oklch(42.6% 0.086 243.9)
-
Step 900
900
#1E4563
oklch(37.7% 0.068 244.3)
-
Step 950
950
#13293A
oklch(27.2% 0.042 243.6)
#599BCF 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) | #849CD1 | 0.048 |
| Deuteranopia (no green cones) | #7590CE | 0.039 |
| Tritanopia (no blue cones) | #00A8AD | 0.084 |
| Achromatopsia (no color) | #959595 | 0.103 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599BCF
#599BCF
oklch(66.7% 0.103 244)
- #C0864D
#C0864D
oklch(66.6% 0.102 64)
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 #599BCF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Faded Blue #658CBB ΔE 0.044
- Cornflower Blue #6495ED ΔE 0.053
- Greyblue #77A1B5 ΔE 0.056
- Chefchaouen Blue #4895EF ΔE 0.056
- Dark Sky Blue #448EE4 ΔE 0.057
- Silver Lake Blue #778DA9 ΔE 0.063
- Dusty Blue #5A86AD ΔE 0.068
- Blue Grey #758DA3 ΔE 0.069
Use #599BCF 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.