#599EE3
Closest named color: Cornflower Blue (#6495ED). oklch(68.4% 0.124 250.1), rgb(89, 158, 227).
Aa
Black text reads best on this color (7.42:1).
About this color
#599EE3 is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.124 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.032 away. Black text reads best on it, at 7.42:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.124) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.42:1 |
| White text | 2.82:1 |
Values
| HEX | #599EE3 |
| RGB | rgb(89, 158, 227) |
| HSL | hsl(210, 71%, 62%) |
| OKLCH | oklch(68.4% 0.124 250.1) |
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 #599EE3 | 2.82:1 | Fails | Lc -59.4 | Large or bold text, headings |
| Black text on #599EE3 | 7.42:1 | AAA | Lc 49.9 | Large or bold text, headings |
| #599EE3 text on white | 2.82:1 | Fails | Lc 54.1 | Large or bold text, headings |
| #599EE3 text on black | 7.42:1 | AAA | Lc -47.7 | 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
#C4DCF5
oklch(88.5% 0.043 249.4)
-
Step 300
300
#9BC5F2
oklch(80.9% 0.078 250.5)
-
Step 400
400 (this color)
#599EE3
oklch(68.4% 0.124 250.1)
-
Step 500
500
#2A8DE5
oklch(63.1% 0.159 250.1)
-
Step 600
600
#0076CB
oklch(55.7% 0.158 250)
-
Step 700
700
#0063AC
oklch(49.2% 0.139 250)
-
Step 800
800
#00518E
oklch(42.8% 0.121 249.9)
-
Step 900
900
#054376
oklch(37.7% 0.104 250.4)
-
Step 950
950
#082845
oklch(27.1% 0.065 249.8)
#599EE3 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) | #81A1E6 | 0.045 |
| Deuteranopia (no green cones) | #6E94E2 | 0.031 |
| Tritanopia (no blue cones) | #00AEB6 | 0.101 |
| Achromatopsia (no color) | #9A9A9A | 0.124 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599EE3
#599EE3
oklch(68.4% 0.124 250.1)
- #CA8A37
#CA8A37
oklch(68.3% 0.124 69.6)
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 #599EE3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.032
- Chefchaouen Blue #4895EF ΔE 0.037
- Dark Sky Blue #448EE4 ΔE 0.051
- Soft Blue #6488EA ΔE 0.062
- Faded Blue #658CBB ΔE 0.067
- Dodger Blue #1E90FF ΔE 0.073
- Periwinkle Blue #8F99FB ΔE 0.074
- Perrywinkle #8F8CE7 ΔE 0.075
Use #599EE3 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.