#599CD3
Closest named color: Cornflower Blue (#6495ED). oklch(67.1% 0.107 245.1), rgb(89, 156, 211).
Aa
Black text reads best on this color (7.12:1).
About this color
#599CD3 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.107 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.049 away. Black text reads best on it, at 7.12:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.107) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.12:1 |
| White text | 2.94:1 |
Values
| HEX | #599CD3 |
| RGB | rgb(89, 156, 211) |
| HSL | hsl(207, 58%, 59%) |
| OKLCH | oklch(67.1% 0.107 245.1) |
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 #599CD3 | 2.94:1 | Fails | Lc -61.2 | Content text, not long reading |
| Black text on #599CD3 | 7.12:1 | AAA | Lc 48.2 | Large or bold text, headings |
| #599CD3 text on white | 2.94:1 | Fails | Lc 55.8 | Large or bold text, headings |
| #599CD3 text on black | 7.12:1 | AAA | Lc -46.0 | 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0ECF6
oklch(93.7% 0.019 243)
-
Step 200
200
#C6DCF1
oklch(88.5% 0.037 247)
-
Step 300
300
#9DC6EA
oklch(81% 0.067 245.3)
-
Step 400
400 (this color)
#599CD3
oklch(67.1% 0.107 245.1)
-
Step 500
500
#3190D6
oklch(63.1% 0.137 245.1)
-
Step 600
600
#0079BF
oklch(55.7% 0.14 245)
-
Step 700
700
#0065A2
oklch(49% 0.125 245.5)
-
Step 800
800
#005385
oklch(42.7% 0.107 244.8)
-
Step 900
900
#09456D
oklch(37.7% 0.089 244.8)
-
Step 950
950
#0A2940
oklch(27.1% 0.056 244.7)
#599CD3 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) | #849DD5 | 0.048 |
| Deuteranopia (no green cones) | #7491D2 | 0.038 |
| Tritanopia (no blue cones) | #00A9AF | 0.086 |
| Achromatopsia (no color) | #969696 | 0.107 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599CD3
#599CD3
oklch(67.1% 0.107 245.1)
- #C3874A
#C3874A
oklch(67.1% 0.107 64.6)
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 #599CD3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.049
- Faded Blue #658CBB ΔE 0.049
- Chefchaouen Blue #4895EF ΔE 0.052
- Dark Sky Blue #448EE4 ΔE 0.056
- Greyblue #77A1B5 ΔE 0.059
- Silver Lake Blue #778DA9 ΔE 0.068
- Soft Blue #6488EA ΔE 0.071
- Dusty Blue #5A86AD ΔE 0.074
Use #599CD3 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.