#599DBF
Closest named color: Greyblue (#77A1B5). oklch(66.4% 0.086 231.8), rgb(89, 157, 191).
Aa
Black text reads best on this color (6.99:1).
About this color
#599DBF is a medium-light, moderately saturated blue. In OKLCH its lightness is 66%, its chroma 0.086 and its hue 232°. Its hue sits on the cool side of the wheel. The nearest named color is Greyblue (#77A1B5), ΔE 0.038 away. Black text reads best on it, at 6.99:1.
| Hue family | Blues |
| Lightness | medium-light (66%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Greyblue (#77A1B5) |
| Black text | 6.99:1 |
| White text | 3.00:1 |
Values
| HEX | #599DBF |
| RGB | rgb(89, 157, 191) |
| HSL | hsl(200, 44%, 55%) |
| OKLCH | oklch(66.4% 0.086 231.8) |
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 #599DBF | 3.00:1 | AA large text | Lc -61.9 | Content text, not long reading |
| Black text on #599DBF | 6.99:1 | AA | Lc 47.5 | Large or bold text, headings |
| #599DBF text on white | 3.00:1 | AA large text | Lc 56.5 | Large or bold text, headings |
| #599DBF text on black | 6.99:1 | AA | Lc -45.2 | 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
#CBDCE6
oklch(88.5% 0.023 233.4)
-
Step 300
300
#A6C6D7
oklch(80.9% 0.042 231.1)
-
Step 400
400
#75A9C3
oklch(70.8% 0.067 230.6)
-
Step 500
500 (this color)
#599DBF
oklch(66.4% 0.086 231.8)
-
Step 600
600
#2E7CA0
oklch(55.5% 0.093 232.1)
-
Step 700
700
#206989
oklch(49.1% 0.086 231.5)
-
Step 800
800
#1D566F
oklch(42.8% 0.071 230.8)
-
Step 900
900
#1F475A
oklch(37.8% 0.055 231.4)
-
Step 950
950
#132A35
oklch(27.2% 0.035 230.7)
#599DBF 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) | #8C9BC1 | 0.058 |
| Deuteranopia (no green cones) | #7E90BF | 0.051 |
| Tritanopia (no blue cones) | #13A6A8 | 0.064 |
| Achromatopsia (no color) | #959595 | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599DBF
#599DBF
oklch(66.4% 0.086 231.8)
- #BE8562
#BE8562
oklch(66.6% 0.086 52.3)
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 #599DBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Greyblue #77A1B5 ΔE 0.038
- Faded Blue #658CBB ΔE 0.047
- Cadet Blue #5F9EA0 ΔE 0.048
- Silver Lake Blue #778DA9 ΔE 0.053
- Blue Grey #758DA3 ΔE 0.055
- Bluegrey #85A3B2 ΔE 0.057
- Bluey Grey #89A0B0 ΔE 0.059
- Cool Gray #8D99AE ΔE 0.061
Use #599DBF 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.