#599FDA
Closest named color: Cornflower Blue (#6495ED). oklch(68.1% 0.113 245.9), rgb(89, 159, 218).
Aa
Black text reads best on this color (7.39:1).
About this color
#599FDA is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.113 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.045 away. Black text reads best on it, at 7.39:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.113) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.39:1 |
| White text | 2.83:1 |
Values
| HEX | #599FDA |
| RGB | rgb(89, 159, 218) |
| HSL | hsl(207, 64%, 60%) |
| OKLCH | oklch(68.1% 0.113 245.9) |
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 #599FDA | 2.83:1 | Fails | Lc -59.5 | Large or bold text, headings |
| Black text on #599FDA | 7.39:1 | AAA | Lc 49.8 | Large or bold text, headings |
| #599FDA text on white | 2.83:1 | Fails | Lc 54.3 | Large or bold text, headings |
| #599FDA text on black | 7.39:1 | AAA | Lc -47.6 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFECF7
oklch(93.7% 0.02 243.4)
-
Step 200
200
#C5DCF2
oklch(88.4% 0.039 247.1)
-
Step 300
300
#9BC6EC
oklch(80.9% 0.071 245.5)
-
Step 400
400 (this color)
#599FDA
oklch(68.1% 0.113 245.9)
-
Step 500
500
#2A90DA
oklch(63.2% 0.143 245.5)
-
Step 600
600
#0078C1
oklch(55.5% 0.143 246.2)
-
Step 700
700
#0065A3
oklch(49.1% 0.126 245.9)
-
Step 800
800
#005387
oklch(42.8% 0.11 245.8)
-
Step 900
900
#044570
oklch(37.8% 0.094 245.6)
-
Step 950
950
#082941
oklch(27.1% 0.058 244.7)
#599FDA 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) | #86A0DD | 0.050 |
| Deuteranopia (no green cones) | #7494D9 | 0.038 |
| Tritanopia (no blue cones) | #00ADB3 | 0.091 |
| Achromatopsia (no color) | #999999 | 0.113 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599FDA
#599FDA
oklch(68.1% 0.113 245.9)
- #C88A47
#C88A47
oklch(68.2% 0.113 66)
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 #599FDA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.045
- Chefchaouen Blue #4895EF ΔE 0.049
- Dark Sky Blue #448EE4 ΔE 0.058
- Faded Blue #658CBB ΔE 0.060
- Greyblue #77A1B5 ΔE 0.063
- Soft Blue #6488EA ΔE 0.071
- Turquoise Blue #06B1C4 ΔE 0.076
- Bluegrey #85A3B2 ΔE 0.077
Use #599FDA 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.