#599FEE
Closest named color: Cornflower Blue (#6495ED). oklch(69.1% 0.137 252.9), rgb(89, 159, 238).
Aa
Black text reads best on this color (7.61:1).
About this color
#599FEE is a medium-light, moderately saturated blue. In OKLCH its lightness is 69%, its chroma 0.137 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.027 away. Black text reads best on it, at 7.61:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.61:1 |
| White text | 2.75:1 |
Values
| HEX | #599FEE |
| RGB | rgb(89, 159, 238) |
| HSL | hsl(212, 81%, 64%) |
| OKLCH | oklch(69.1% 0.137 252.9) |
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 #599FEE | 2.75:1 | Fails | Lc -58.2 | Large or bold text, headings |
| Black text on #599FEE | 7.61:1 | AAA | Lc 51.0 | Large or bold text, headings |
| #599FEE text on white | 2.75:1 | Fails | Lc 53.0 | Large or bold text, headings |
| #599FEE text on black | 7.61:1 | AAA | Lc -48.9 | 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
#99C4F7
oklch(80.8% 0.086 253.1)
-
Step 400
400 (this color)
#599FEE
oklch(69.1% 0.137 252.9)
-
Step 500
500
#268AEF
oklch(63% 0.175 253.1)
-
Step 600
600
#0073D3
oklch(55.6% 0.171 252.9)
-
Step 700
700
#0061B3
oklch(49.2% 0.151 252.8)
-
Step 800
800
#004F94
oklch(42.8% 0.131 252.8)
-
Step 900
900
#02427C
oklch(37.8% 0.114 252.7)
-
Step 950
950
#072748
oklch(27% 0.071 252.7)
#599FEE 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) | #7DA4F1 | 0.041 |
| Deuteranopia (no green cones) | #6995EC | 0.028 |
| Tritanopia (no blue cones) | #00B1BC | 0.109 |
| Achromatopsia (no color) | #9C9C9C | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599FEE
#599FEE
oklch(69.1% 0.137 252.9)
- #CF8C23
#CF8C23
oklch(69.1% 0.137 72.4)
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 #599FEE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.027
- Chefchaouen Blue #4895EF ΔE 0.033
- Dark Sky Blue #448EE4 ΔE 0.052
- Soft Blue #6488EA ΔE 0.060
- Periwinkle Blue #8F99FB ΔE 0.065
- Dodger Blue #1E90FF ΔE 0.066
- Perrywinkle #8F8CE7 ΔE 0.073
- Lavender Blue #8B88F8 ΔE 0.081
Use #599FEE 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.