#599DE4
Closest named color: Cornflower Blue (#6495ED). oklch(68.2% 0.126 251.1), rgb(89, 157, 228).
Aa
Black text reads best on this color (7.36:1).
About this color
#599DE4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.126 and its hue 251°. 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 7.36:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.126) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.36:1 |
| White text | 2.85:1 |
Values
| HEX | #599DE4 |
| RGB | rgb(89, 157, 228) |
| HSL | hsl(211, 72%, 62%) |
| OKLCH | oklch(68.2% 0.126 251.1) |
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 #599DE4 | 2.85:1 | Fails | Lc -59.7 | Large or bold text, headings |
| Black text on #599DE4 | 7.36:1 | AAA | Lc 49.6 | Large or bold text, headings |
| #599DE4 text on white | 2.85:1 | Fails | Lc 54.4 | Large or bold text, headings |
| #599DE4 text on black | 7.36:1 | AAA | Lc -47.4 | 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
#DFEBF9
oklch(93.5% 0.023 252.2)
-
Step 200
200
#C4DCF6
oklch(88.5% 0.044 250.4)
-
Step 300
300
#9BC5F3
oklch(81% 0.079 251.1)
-
Step 400
400 (this color)
#599DE4
oklch(68.2% 0.126 251.1)
-
Step 500
500
#2C8CE7
oklch(63.1% 0.162 251.3)
-
Step 600
600
#0075CE
oklch(55.7% 0.162 251.1)
-
Step 700
700
#0062AE
oklch(49.1% 0.143 251.1)
-
Step 800
800
#005090
oklch(42.7% 0.125 251.1)
-
Step 900
900
#064377
oklch(37.8% 0.105 250.9)
-
Step 950
950
#082746
oklch(26.9% 0.068 251.9)
#599DE4 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) | #7FA0E7 | 0.043 |
| Deuteranopia (no green cones) | #6C93E3 | 0.030 |
| Tritanopia (no blue cones) | #00ADB6 | 0.102 |
| Achromatopsia (no color) | #999999 | 0.126 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599DE4
#599DE4
oklch(68.2% 0.126 251.1)
- #C98A32
#C98A32
oklch(68.2% 0.126 71.2)
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 #599DE4, 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 0.048
- Soft Blue #6488EA ΔE 0.058
- Faded Blue #658CBB ΔE 0.067
- Dodger Blue #1E90FF ΔE 0.071
- Periwinkle Blue #8F99FB ΔE 0.073
- Perrywinkle #8F8CE7 ΔE 0.073
Use #599DE4 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.