#599EF9
Closest named color: Cornflower Blue (#6495ED). oklch(69.5% 0.152 256), rgb(89, 158, 249).
Aa
Black text reads best on this color (7.68:1).
About this color
#599EF9 is a medium-light, vivid blue. In OKLCH its lightness is 70%, its chroma 0.152 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.027 away. Black text reads best on it, at 7.68:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.152) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.68:1 |
| White text | 2.73:1 |
Values
| HEX | #599EF9 |
| RGB | rgb(89, 158, 249) |
| HSL | hsl(214, 93%, 66%) |
| OKLCH | oklch(69.5% 0.152 256) |
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 #599EF9 | 2.73:1 | Fails | Lc -57.8 | Large or bold text, headings |
| Black text on #599EF9 | 7.68:1 | AAA | Lc 51.4 | Large or bold text, headings |
| #599EF9 text on white | 2.73:1 | Fails | Lc 52.6 | Large or bold text, headings |
| #599EF9 text on black | 7.68:1 | AAA | Lc -49.2 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DEEBFD
oklch(93.6% 0.028 256.5)
-
Step 200
200
#C3DBFC
oklch(88.4% 0.052 256.4)
-
Step 300
300
#98C3FE
oklch(80.8% 0.096 256.4)
-
Step 400
400 (this color)
#599EF9
oklch(69.5% 0.152 256)
-
Step 500
500
#2687FB
oklch(63.1% 0.194 256)
-
Step 600
600
#006FDF
oklch(55.6% 0.191 256.1)
-
Step 700
700
#005DBD
oklch(49.1% 0.169 256.1)
-
Step 800
800
#004C9C
oklch(42.7% 0.146 256)
-
Step 900
900
#023F82
oklch(37.6% 0.126 256)
-
Step 950
950
#06264C
oklch(27% 0.079 255.4)
#599EF9 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) | #76A5FD | 0.037 |
| Deuteranopia (no green cones) | #5F96F7 | 0.021 |
| Tritanopia (no blue cones) | #00B3C0 | 0.122 |
| Achromatopsia (no color) | #9C9C9C | 0.152 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599EF9
#599EF9
oklch(69.5% 0.152 256)
- #D08E00
#D08E00
oklch(69.5% 0.146 75.9)
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 #599EF9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.027
- Chefchaouen Blue #4895EF ΔE 0.032
- Dark Sky Blue #448EE4 ΔE 0.055
- Soft Blue #6488EA ΔE 0.057
- Dodger Blue #1E90FF ΔE 0.058
- Periwinkle Blue #8F99FB ΔE 0.060
- Perrywinkle #8F8CE7 ΔE 0.072
- Lavender Blue #8B88F8 ΔE 0.074
Use #599EF9 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.