#599DF1
Closest named color: Cornflower Blue (#6495ED). oklch(68.9% 0.143 254.7), rgb(89, 157, 241).
Aa
Black text reads best on this color (7.51:1).
About this color
#599DF1 is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.143 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.022 away. Black text reads best on it, at 7.51:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.143) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.51:1 |
| White text | 2.79:1 |
Values
| HEX | #599DF1 |
| RGB | rgb(89, 157, 241) |
| HSL | hsl(213, 84%, 65%) |
| OKLCH | oklch(68.9% 0.143 254.7) |
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 #599DF1 | 2.79:1 | Fails | Lc -58.8 | Large or bold text, headings |
| Black text on #599DF1 | 7.51:1 | AAA | Lc 50.5 | Large or bold text, headings |
| #599DF1 text on white | 2.79:1 | Fails | Lc 53.5 | Large or bold text, headings |
| #599DF1 text on black | 7.51:1 | AAA | Lc -48.3 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C4DBFA
oklch(88.4% 0.05 255.9)
-
Step 300
300
#99C4FA
oklch(80.9% 0.09 254.4)
-
Step 400
400 (this color)
#599DF1
oklch(68.9% 0.143 254.7)
-
Step 500
500
#2989F4
oklch(63.2% 0.182 254.7)
-
Step 600
600
#0071DA
oklch(55.6% 0.182 254.8)
-
Step 700
700
#005FB8
oklch(49.1% 0.16 254.6)
-
Step 800
800
#004D98
oklch(42.6% 0.139 254.8)
-
Step 900
900
#04407E
oklch(37.5% 0.119 254.8)
-
Step 950
950
#07264A
oklch(26.9% 0.076 254.9)
#599DF1 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) | #79A3F4 | 0.039 |
| Deuteranopia (no green cones) | #6494EF | 0.024 |
| Tritanopia (no blue cones) | #00B0BC | 0.115 |
| Achromatopsia (no color) | #9B9B9B | 0.143 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #599DF1
#599DF1
oklch(68.9% 0.143 254.7)
- #CE8C0E
#CE8C0E
oklch(68.9% 0.143 74.8)
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 #599DF1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.022
- Chefchaouen Blue #4895EF ΔE 0.028
- Dark Sky Blue #448EE4 ΔE 0.049
- Soft Blue #6488EA ΔE 0.054
- Dodger Blue #1E90FF ΔE 0.060
- Periwinkle Blue #8F99FB ΔE 0.063
- Perrywinkle #8F8CE7 ΔE 0.070
- Lavender Blue #8B88F8 ΔE 0.076
Use #599DF1 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.