#599EDB
Closest named color: Cornflower Blue (#6495ED). oklch(68% 0.115 247.1), rgb(89, 158, 219).
Aa
Black text reads best on this color (7.33:1).
About this color
#599EDB is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.115 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.042 away. Black text reads best on it, at 7.33:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.33:1 |
| White text | 2.86:1 |
Values
| HEX | #599EDB |
| RGB | rgb(89, 158, 219) |
| HSL | hsl(208, 64%, 60%) |
| OKLCH | oklch(68% 0.115 247.1) |
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 #599EDB | 2.86:1 | Fails | Lc -59.9 | Large or bold text, headings |
| Black text on #599EDB | 7.33:1 | AAA | Lc 49.5 | Large or bold text, headings |
| #599EDB text on white | 2.86:1 | Fails | Lc 54.6 | Large or bold text, headings |
| #599EDB text on black | 7.33:1 | AAA | Lc -47.2 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#DFECF7
oklch(93.7% 0.02 243.4)
-
Step 200
200
#C5DCF3
oklch(88.5% 0.04 248.3)
-
Step 300
300
#9CC6ED
oklch(81% 0.071 246.8)
-
Step 400
400 (this color)
#599EDB
oklch(68% 0.115 247.1)
-
Step 500
500
#2C8FDC
oklch(63.1% 0.146 246.9)
-
Step 600
600
#0078C3
oklch(55.7% 0.146 246.8)
-
Step 700
700
#0064A5
oklch(49% 0.13 247.2)
-
Step 800
800
#005288
oklch(42.7% 0.112 246.9)
-
Step 900
900
#064471
oklch(37.6% 0.096 247.4)
-
Step 950
950
#082842
oklch(26.9% 0.061 247.3)
#599EDB 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) | #84A0DE | 0.048 |
| Deuteranopia (no green cones) | #7293DA | 0.036 |
| Tritanopia (no blue cones) | #00ACB3 | 0.092 |
| Achromatopsia (no color) | #999999 | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599EDB
#599EDB
oklch(68% 0.115 247.1)
- #C78943
#C78943
oklch(67.9% 0.115 66.9)
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 #599EDB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.042
- Chefchaouen Blue #4895EF ΔE 0.046
- Dark Sky Blue #448EE4 ΔE 0.054
- Faded Blue #658CBB ΔE 0.059
- Greyblue #77A1B5 ΔE 0.066
- Soft Blue #6488EA ΔE 0.068
- Silver Lake Blue #778DA9 ΔE 0.079
- Turquoise Blue #06B1C4 ΔE 0.079
Use #599EDB 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.