#599EF0
Closest named color: Cornflower Blue (#6495ED). oklch(69% 0.14 254), rgb(89, 158, 240).
Aa
Black text reads best on this color (7.57:1).
About this color
#599EF0 is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.140 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.024 away. Black text reads best on it, at 7.57:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.140) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.57:1 |
| White text | 2.77:1 |
Values
| HEX | #599EF0 |
| RGB | rgb(89, 158, 240) |
| HSL | hsl(213, 83%, 65%) |
| OKLCH | oklch(69% 0.14 254) |
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 #599EF0 | 2.77:1 | Fails | Lc -58.5 | Large or bold text, headings |
| Black text on #599EF0 | 7.57:1 | AAA | Lc 50.8 | Large or bold text, headings |
| #599EF0 text on white | 2.77:1 | Fails | Lc 53.2 | Large or bold text, headings |
| #599EF0 text on black | 7.57:1 | AAA | Lc -48.6 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C4DCF9
oklch(88.6% 0.048 253.2)
-
Step 300
300
#99C4F9
oklch(80.9% 0.088 254)
-
Step 400
400 (this color)
#599EF0
oklch(69% 0.14 254)
-
Step 500
500
#2789F2
oklch(63% 0.18 254.1)
-
Step 600
600
#0072D7
oklch(55.6% 0.177 254)
-
Step 700
700
#0060B6
oklch(49.2% 0.156 253.8)
-
Step 800
800
#004E96
oklch(42.7% 0.135 253.8)
-
Step 900
900
#03417D
oklch(37.7% 0.117 253.8)
-
Step 950
950
#072749
oklch(27.1% 0.073 253.3)
#599EF0 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) | #7BA3F3 | 0.039 |
| Deuteranopia (no green cones) | #6695EE | 0.025 |
| Tritanopia (no blue cones) | #00B1BC | 0.114 |
| Achromatopsia (no color) | #9B9B9B | 0.140 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599EF0
#599EF0
oklch(69% 0.14 254)
- #CE8C19
#CE8C19
oklch(69% 0.14 74)
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 #599EF0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.024
- Chefchaouen Blue #4895EF ΔE 0.030
- Dark Sky Blue #448EE4 ΔE 0.051
- Soft Blue #6488EA ΔE 0.057
- Dodger Blue #1E90FF ΔE 0.063
- Periwinkle Blue #8F99FB ΔE 0.064
- Perrywinkle #8F8CE7 ΔE 0.071
- Lavender Blue #8B88F8 ΔE 0.078
Use #599EF0 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.