#599FF9
Closest named color: Cornflower Blue (#6495ED). oklch(69.7% 0.151 255.6), rgb(89, 159, 249).
Aa
Black text reads best on this color (7.75:1).
About this color
#599FF9 is a medium-light, vivid blue. In OKLCH its lightness is 70%, its chroma 0.151 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.029 away. Black text reads best on it, at 7.75:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.75:1 |
| White text | 2.70:1 |
Values
| HEX | #599FF9 |
| RGB | rgb(89, 159, 249) |
| HSL | hsl(214, 93%, 66%) |
| OKLCH | oklch(69.7% 0.151 255.6) |
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 #599FF9 | 2.70:1 | Fails | Lc -57.5 | Large or bold text, headings |
| Black text on #599FF9 | 7.75:1 | AAA | Lc 51.8 | Large or bold text, headings |
| #599FF9 text on white | 2.70:1 | Fails | Lc 52.3 | Large or bold text, headings |
| #599FF9 text on black | 7.75:1 | AAA | Lc -49.6 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DEEBFC
oklch(93.5% 0.027 255.1)
-
Step 200
200
#C3DBFC
oklch(88.4% 0.052 256.4)
-
Step 300
300
#98C4FD
oklch(81% 0.094 255.2)
-
Step 400
400 (this color)
#599FF9
oklch(69.7% 0.151 255.6)
-
Step 500
500
#2487FA
oklch(63% 0.193 255.7)
-
Step 600
600
#0070DD
oklch(55.6% 0.187 255.6)
-
Step 700
700
#005EBB
oklch(49.1% 0.165 255.5)
-
Step 800
800
#004D9B
oklch(42.8% 0.143 255.4)
-
Step 900
900
#014082
oklch(37.8% 0.125 255.4)
-
Step 950
950
#06264C
oklch(27% 0.079 255.4)
#599FF9 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) | #77A5FD | 0.036 |
| Deuteranopia (no green cones) | #6196F7 | 0.023 |
| Tritanopia (no blue cones) | #00B4C0 | 0.122 |
| Achromatopsia (no color) | #9D9D9D | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599FF9
#599FF9
oklch(69.7% 0.151 255.6)
- #D18E00
#D18E00
oklch(69.6% 0.147 75.4)
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 #599FF9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.029
- Chefchaouen Blue #4895EF ΔE 0.034
- Dark Sky Blue #448EE4 ΔE 0.057
- Soft Blue #6488EA ΔE 0.060
- Periwinkle Blue #8F99FB ΔE 0.060
- Dodger Blue #1E90FF ΔE 0.060
- Perrywinkle #8F8CE7 ΔE 0.073
- Lavender Blue #8B88F8 ΔE 0.075
Use #599FF9 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.