#599CEB
Closest named color: Cornflower Blue (#6495ED). oklch(68.3% 0.136 253.8), rgb(89, 156, 235).
Aa
Black text reads best on this color (7.37:1).
About this color
#599CEB is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.136 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.021 away. Black text reads best on it, at 7.37:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.136) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.37:1 |
| White text | 2.84:1 |
Values
| HEX | #599CEB |
| RGB | rgb(89, 156, 235) |
| HSL | hsl(212, 78%, 64%) |
| OKLCH | oklch(68.3% 0.136 253.8) |
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 #599CEB | 2.84:1 | Fails | Lc -59.6 | Large or bold text, headings |
| Black text on #599CEB | 7.37:1 | AAA | Lc 49.7 | Large or bold text, headings |
| #599CEB text on white | 2.84:1 | Fails | Lc 54.3 | Large or bold text, headings |
| #599CEB text on black | 7.37:1 | AAA | Lc -47.5 | 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
#DFEBFA
oklch(93.6% 0.024 254)
-
Step 200
200
#C4DCF8
oklch(88.6% 0.047 252.4)
-
Step 300
300
#9AC4F7
oklch(80.9% 0.085 253.6)
-
Step 400
400 (this color)
#599CEB
oklch(68.3% 0.136 253.8)
-
Step 500
500
#2C8AEF
oklch(63.1% 0.174 253.8)
-
Step 600
600
#0072D6
oklch(55.6% 0.176 253.8)
-
Step 700
700
#0060B5
oklch(49.2% 0.155 253.6)
-
Step 800
800
#004E96
oklch(42.7% 0.135 253.8)
-
Step 900
900
#06417B
oklch(37.6% 0.113 253.7)
-
Step 950
950
#082748
oklch(27.1% 0.071 253.2)
#599CEB 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) | #7AA1EE | 0.039 |
| Deuteranopia (no green cones) | #6693E9 | 0.025 |
| Tritanopia (no blue cones) | #00AEB9 | 0.110 |
| Achromatopsia (no color) | #999999 | 0.136 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599CEB
#599CEB
oklch(68.3% 0.136 253.8)
- #CB8B20
#CB8B20
oklch(68.5% 0.136 73.9)
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 #599CEB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.021
- Chefchaouen Blue #4895EF ΔE 0.027
- Dark Sky Blue #448EE4 ΔE 0.045
- Soft Blue #6488EA ΔE 0.052
- Dodger Blue #1E90FF ΔE 0.063
- Periwinkle Blue #8F99FB ΔE 0.067
- Perrywinkle #8F8CE7 ΔE 0.070
- Faded Blue #658CBB ΔE 0.075
Use #599CEB 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.