#599CEC
Closest named color: Cornflower Blue (#6495ED). oklch(68.4% 0.137 254), rgb(89, 156, 236).
Aa
Black text reads best on this color (7.39:1).
About this color
#599CEC is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.137 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.020 away. Black text reads best on it, at 7.39:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.137) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.39:1 |
| White text | 2.84:1 |
Values
| HEX | #599CEC |
| RGB | rgb(89, 156, 236) |
| HSL | hsl(213, 79%, 64%) |
| OKLCH | oklch(68.4% 0.137 254) |
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 #599CEC | 2.84:1 | Fails | Lc -59.5 | Large or bold text, headings |
| Black text on #599CEC | 7.39:1 | AAA | Lc 49.8 | Large or bold text, headings |
| #599CEC text on white | 2.84:1 | Fails | Lc 54.3 | Large or bold text, headings |
| #599CEC text on black | 7.39:1 | AAA | Lc -47.6 | 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
#9AC4F7
oklch(80.9% 0.085 253.6)
-
Step 400
400 (this color)
#599CEC
oklch(68.4% 0.137 254)
-
Step 500
500
#2C8AF0
oklch(63.2% 0.175 254)
-
Step 600
600
#0072D7
oklch(55.6% 0.177 254)
-
Step 700
700
#005FB6
oklch(49% 0.157 254.2)
-
Step 800
800
#004E97
oklch(42.8% 0.136 254.1)
-
Step 900
900
#06417C
oklch(37.7% 0.115 254)
-
Step 950
950
#082749
oklch(27.1% 0.073 253.8)
#599CEC 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) | #7AA1EF | 0.039 |
| Deuteranopia (no green cones) | #6693EA | 0.025 |
| Tritanopia (no blue cones) | #00AEB9 | 0.111 |
| Achromatopsia (no color) | #999999 | 0.137 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599CEC
#599CEC
oklch(68.4% 0.137 254)
- #CB8B1D
#CB8B1D
oklch(68.4% 0.137 74.3)
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 #599CEC, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.020
- Chefchaouen Blue #4895EF ΔE 0.027
- Dark Sky Blue #448EE4 ΔE 0.045
- Soft Blue #6488EA ΔE 0.052
- Dodger Blue #1E90FF ΔE 0.062
- Periwinkle Blue #8F99FB ΔE 0.066
- Perrywinkle #8F8CE7 ΔE 0.070
- Faded Blue #658CBB ΔE 0.076
Use #599CEC 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.