#599FFF
Closest named color: Cornflower Blue (#6495ED). oklch(70.1% 0.158 256.8), rgb(89, 159, 255).
Aa
Black text reads best on this color (7.82:1).
About this color
#599FFF is a medium-light, vivid blue. In OKLCH its lightness is 70%, its chroma 0.158 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.033 away. Black text reads best on it, at 7.82:1.
| Hue family | Blues |
| Lightness | medium-light (70%) |
| Chroma | vivid (0.158) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.82:1 |
| White text | 2.68:1 |
Values
| HEX | #599FFF |
| RGB | rgb(89, 159, 255) |
| HSL | hsl(215, 100%, 67%) |
| OKLCH | oklch(70.1% 0.158 256.8) |
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 #599FFF | 2.68:1 | Fails | Lc -57.0 | Large or bold text, headings |
| Black text on #599FFF | 7.82:1 | AAA | Lc 52.2 | Large or bold text, headings |
| #599FFF text on white | 2.68:1 | Fails | Lc 51.8 | Large or bold text, headings |
| #599FFF text on black | 7.82:1 | AAA | Lc -50.1 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DEEBFD
oklch(93.6% 0.028 256.5)
-
Step 200
200
#C2DBFE
oklch(88.4% 0.055 256.8)
-
Step 300
300
#98C3FF
oklch(80.9% 0.097 256.8)
-
Step 400
400 (this color)
#599FFF
oklch(70.1% 0.158 256.8)
-
Step 500
500
#2486FF
oklch(63.2% 0.2 256.7)
-
Step 600
600
#006EE2
oklch(55.6% 0.196 256.8)
-
Step 700
700
#005CC0
oklch(49.1% 0.174 256.9)
-
Step 800
800
#004B9F
oklch(42.7% 0.151 256.9)
-
Step 900
900
#013E85
oklch(37.6% 0.132 256.9)
-
Step 950
950
#06254E
oklch(26.9% 0.084 257.1)
#599FFF 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) | #74A6FF | 0.035 |
| Deuteranopia (no green cones) | #5C97FD | 0.020 |
| Tritanopia (no blue cones) | #00B5C3 | 0.127 |
| Achromatopsia (no color) | #9E9E9E | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599FFF
#599FFF
oklch(70.1% 0.158 256.8)
- #D19000
#D19000
oklch(70% 0.147 76.7)
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 #599FFF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.033
- Chefchaouen Blue #4895EF ΔE 0.038
- Periwinkle Blue #8F99FB ΔE 0.059
- Dodger Blue #1E90FF ΔE 0.059
- Dark Sky Blue #448EE4 ΔE 0.061
- Soft Blue #6488EA ΔE 0.062
- Lavender Blue #8B88F8 ΔE 0.074
- Perrywinkle #8F8CE7 ΔE 0.075
Use #599FFF 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.