#599BD4
Closest named color: Cornflower Blue (#6495ED). oklch(66.9% 0.109 246.4), rgb(89, 155, 212).
Aa
Black text reads best on this color (7.06:1).
About this color
#599BD4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.109 and its hue 246°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.046 away. Black text reads best on it, at 7.06:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.06:1 |
| White text | 2.97:1 |
Values
| HEX | #599BD4 |
| RGB | rgb(89, 155, 212) |
| HSL | hsl(208, 59%, 59%) |
| OKLCH | oklch(66.9% 0.109 246.4) |
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 #599BD4 | 2.97:1 | Fails | Lc -61.5 | Content text, not long reading |
| Black text on #599BD4 | 7.06:1 | AAA | Lc 47.9 | Large or bold text, headings |
| #599BD4 text on white | 2.97:1 | Fails | Lc 56.1 | Large or bold text, headings |
| #599BD4 text on black | 7.06:1 | AAA | Lc -45.6 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0EBF7
oklch(93.5% 0.02 250.4)
-
Step 200
200
#C6DCF1
oklch(88.5% 0.037 247)
-
Step 300
300
#9DC6EB
oklch(81% 0.068 246)
-
Step 400
400 (this color)
#599BD4
oklch(66.9% 0.109 246.4)
-
Step 500
500
#328FD8
oklch(63% 0.139 246.5)
-
Step 600
600
#0078C2
oklch(55.6% 0.145 246.5)
-
Step 700
700
#0065A4
oklch(49.2% 0.127 246.3)
-
Step 800
800
#005287
oklch(42.6% 0.111 246.5)
-
Step 900
900
#0B456E
oklch(37.8% 0.09 245.8)
-
Step 950
950
#0A2841
oklch(26.9% 0.058 247.4)
#599BD4 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) | #839CD7 | 0.047 |
| Deuteranopia (no green cones) | #7290D3 | 0.037 |
| Tritanopia (no blue cones) | #00A9AF | 0.089 |
| Achromatopsia (no color) | #969696 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599BD4
#599BD4
oklch(66.9% 0.109 246.4)
- #C28746
#C28746
oklch(67% 0.109 66.6)
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 #599BD4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.046
- Faded Blue #658CBB ΔE 0.048
- Chefchaouen Blue #4895EF ΔE 0.049
- Dark Sky Blue #448EE4 ΔE 0.052
- Greyblue #77A1B5 ΔE 0.061
- Soft Blue #6488EA ΔE 0.067
- Silver Lake Blue #778DA9 ΔE 0.069
- Dusty Blue #5A86AD ΔE 0.073
Use #599BD4 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.