#599DDE
Closest named color: Cornflower Blue (#6495ED). oklch(67.9% 0.119 249), rgb(89, 157, 222).
Aa
Black text reads best on this color (7.30:1).
About this color
#599DDE is a medium-light, moderately saturated blue. In OKLCH its lightness is 68%, its chroma 0.119 and its hue 249°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.036 away. Black text reads best on it, at 7.30:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | moderately saturated (0.119) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.30:1 |
| White text | 2.87:1 |
Values
| HEX | #599DDE |
| RGB | rgb(89, 157, 222) |
| HSL | hsl(209, 67%, 61%) |
| OKLCH | oklch(67.9% 0.119 249) |
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 #599DDE | 2.87:1 | Fails | Lc -60.1 | Content text, not long reading |
| Black text on #599DDE | 7.30:1 | AAA | Lc 49.3 | Large or bold text, headings |
| #599DDE text on white | 2.87:1 | Fails | Lc 54.8 | Large or bold text, headings |
| #599DDE text on black | 7.30:1 | AAA | Lc -47.0 | 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
#F0F6FC
oklch(97% 0.01 247.9)
-
Step 100
100
#DFEBF8
oklch(93.5% 0.022 250.2)
-
Step 200
200
#C5DCF4
oklch(88.5% 0.041 249.4)
-
Step 300
300
#9CC5EF
oklch(80.9% 0.074 249.4)
-
Step 400
400 (this color)
#599DDE
oklch(67.9% 0.119 249)
-
Step 500
500
#2D8EE0
oklch(63.1% 0.151 248.7)
-
Step 600
600
#0076C8
oklch(55.5% 0.154 249.2)
-
Step 700
700
#0063A9
oklch(49% 0.136 249.1)
-
Step 800
800
#00518C
oklch(42.7% 0.118 249.2)
-
Step 900
900
#074473
oklch(37.8% 0.098 248.6)
-
Step 950
950
#082843
oklch(27% 0.062 248.2)
#599DDE 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) | #819FE1 | 0.044 |
| Deuteranopia (no green cones) | #6F92DD | 0.034 |
| Tritanopia (no blue cones) | #00ACB4 | 0.096 |
| Achromatopsia (no color) | #989898 | 0.119 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599DDE
#599DDE
oklch(67.9% 0.119 249)
- #C7893C
#C7893C
oklch(67.8% 0.119 69)
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 #599DDE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.036
- Chefchaouen Blue #4895EF ΔE 0.040
- Dark Sky Blue #448EE4 ΔE 0.050
- Faded Blue #658CBB ΔE 0.061
- Soft Blue #6488EA ΔE 0.063
- Greyblue #77A1B5 ΔE 0.071
- Perrywinkle #8F8CE7 ΔE 0.076
- Dodger Blue #1E90FF ΔE 0.077
Use #599DDE 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.