#599EE4
Closest named color: Cornflower Blue (#6495ED). oklch(68.4% 0.126 250.4), rgb(89, 158, 228).
Aa
Black text reads best on this color (7.43:1).
About this color
#599EE4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.126 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.031 away. Black text reads best on it, at 7.43:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.43:1 |
| White text | 2.82:1 |
Values
| HEX | #599EE4 |
| RGB | rgb(89, 158, 228) |
| HSL | hsl(210, 72%, 62%) |
| OKLCH | oklch(68.4% 0.126 250.4) |
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 #599EE4 | 2.82:1 | Fails | Lc -59.3 | Large or bold text, headings |
| Black text on #599EE4 | 7.43:1 | AAA | Lc 50.0 | Large or bold text, headings |
| #599EE4 text on white | 2.82:1 | Fails | Lc 54.0 | Large or bold text, headings |
| #599EE4 text on black | 7.43:1 | AAA | Lc -47.8 | 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
#DFEBF9
oklch(93.5% 0.023 252.2)
-
Step 200
200
#C4DCF6
oklch(88.5% 0.044 250.4)
-
Step 300
300
#9BC5F2
oklch(80.9% 0.078 250.5)
-
Step 400
400 (this color)
#599EE4
oklch(68.4% 0.126 250.4)
-
Step 500
500
#2A8DE6
oklch(63.2% 0.16 250.4)
-
Step 600
600
#0075CC
oklch(55.6% 0.16 250.6)
-
Step 700
700
#0062AC
oklch(49% 0.141 250.5)
-
Step 800
800
#00508F
oklch(42.6% 0.123 250.8)
-
Step 900
900
#044376
oklch(37.7% 0.104 250.2)
-
Step 950
950
#082845
oklch(27.1% 0.065 249.8)
#599EE4 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) | #80A1E7 | 0.043 |
| Deuteranopia (no green cones) | #6D94E3 | 0.031 |
| Tritanopia (no blue cones) | #00AEB7 | 0.101 |
| Achromatopsia (no color) | #9A9A9A | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599EE4
#599EE4
oklch(68.4% 0.126 250.4)
- #CA8B35
#CA8B35
oklch(68.5% 0.125 70.9)
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 #599EE4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.031
- Chefchaouen Blue #4895EF ΔE 0.037
- Dark Sky Blue #448EE4 ΔE 0.050
- Soft Blue #6488EA ΔE 0.061
- Faded Blue #658CBB ΔE 0.069
- Dodger Blue #1E90FF ΔE 0.073
- Periwinkle Blue #8F99FB ΔE 0.073
- Perrywinkle #8F8CE7 ΔE 0.074
Use #599EE4 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.