#599DC4
Closest named color: Greyblue (#77A1B5). oklch(66.7% 0.09 235.5), rgb(89, 157, 196).
Aa
Black text reads best on this color (7.04:1).
About this color
#599DC4 is a medium-light, moderately saturated blue. In OKLCH its lightness is 67%, its chroma 0.090 and its hue 235°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.041 away. Black text reads best on it, at 7.04:1.
| Hue family | Blues |
| Lightness | medium-light (67%) |
| Chroma | moderately saturated (0.090) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 7.04:1 |
| White text | 2.98:1 |
Values
| HEX | #599DC4 |
| RGB | rgb(89, 157, 196) |
| HSL | hsl(202, 48%, 56%) |
| OKLCH | oklch(66.7% 0.09 235.5) |
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 #599DC4 | 2.98:1 | Fails | Lc -61.6 | Content text, not long reading |
| Black text on #599DC4 | 7.04:1 | AAA | Lc 47.8 | Large or bold text, headings |
| #599DC4 text on white | 2.98:1 | Fails | Lc 56.3 | Large or bold text, headings |
| #599DC4 text on black | 7.04:1 | AAA | Lc -45.5 | 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 500.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF1
oklch(93.5% 0.013 236.6)
-
Step 200
200
#CADCE7
oklch(88.4% 0.025 234.5)
-
Step 300
300
#A6C6DA
oklch(81% 0.045 235.5)
-
Step 400
400
#75A8C7
oklch(70.7% 0.071 235.8)
-
Step 500
500 (this color)
#599DC4
oklch(66.7% 0.09 235.5)
-
Step 600
600
#2E7CA5
oklch(55.7% 0.098 235.6)
-
Step 700
700
#1F688D
oklch(49.1% 0.091 235.5)
-
Step 800
800
#1D5572
oklch(42.7% 0.075 235.2)
-
Step 900
900
#1E465C
oklch(37.6% 0.059 235.4)
-
Step 950
950
#132936
oklch(26.9% 0.037 236.3)
#599DC4 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) | #8B9CC6 | 0.057 |
| Deuteranopia (no green cones) | #7C90C3 | 0.049 |
| Tritanopia (no blue cones) | #03A7AA | 0.070 |
| Achromatopsia (no color) | #959595 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599DC4
#599DC4
oklch(66.7% 0.09 235.5)
- #BF855D
#BF855D
oklch(66.6% 0.09 55.1)
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 #599DC4, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.041
- Faded Blue #658CBB ΔE 0.046
- Silver Lake Blue #778DA9 ΔE 0.056
- Cadet Blue #5F9EA0 ΔE 0.056
- Blue Grey #758DA3 ΔE 0.059
- Bluegrey #85A3B2 ΔE 0.060
- Bluey Grey #89A0B0 ΔE 0.061
- Cool Gray #8D99AE ΔE 0.063
Use #599DC4 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.