#5999FA
Closest named color: Cornflower Blue (#6495ED). oklch(68.5% 0.158 258.5), rgb(89, 153, 250).
Aa
Black text reads best on this color (7.36:1).
About this color
#5999FA is a medium-light, vivid blue. In OKLCH its lightness is 69%, its chroma 0.158 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.021 away. Black text reads best on it, at 7.36:1.
| Hue family | Blues |
| Lightness | medium-light (69%) |
| Chroma | vivid (0.158) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.36:1 |
| White text | 2.85:1 |
Values
| HEX | #5999FA |
| RGB | rgb(89, 153, 250) |
| HSL | hsl(216, 94%, 66%) |
| OKLCH | oklch(68.5% 0.158 258.5) |
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 #5999FA | 2.85:1 | Fails | Lc -59.7 | Large or bold text, headings |
| Black text on #5999FA | 7.36:1 | AAA | Lc 49.7 | Large or bold text, headings |
| #5999FA text on white | 2.85:1 | Fails | Lc 54.4 | Large or bold text, headings |
| #5999FA text on black | 7.36:1 | AAA | Lc -47.4 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEBFE
oklch(93.7% 0.029 259.6)
-
Step 200
200
#C3DBFE
oklch(88.5% 0.055 257.7)
-
Step 300
300
#9AC2FF
oklch(80.8% 0.097 258.7)
-
Step 400
400 (this color)
#5999FA
oklch(68.5% 0.158 258.5)
-
Step 500
500
#3084FF
oklch(63% 0.2 258.6)
-
Step 600
600
#006BEB
oklch(55.7% 0.21 258.5)
-
Step 700
700
#0059C7
oklch(49% 0.186 258.6)
-
Step 800
800
#0049A5
oklch(42.7% 0.162 258.5)
-
Step 900
900
#093E86
oklch(37.8% 0.132 258.4)
-
Step 950
950
#09254E
oklch(27.1% 0.083 258.4)
#5999FA 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) | #6EA1FE | 0.032 |
| Deuteranopia (no green cones) | #5692F8 | 0.019 |
| Tritanopia (no blue cones) | #00AFBD | 0.130 |
| Achromatopsia (no color) | #999999 | 0.158 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5999FA
#5999FA
oklch(68.5% 0.158 258.5)
- #C98D00
#C98D00
oklch(68.5% 0.143 78.4)
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 #5999FA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.021
- Chefchaouen Blue #4895EF ΔE 0.025
- Soft Blue #6488EA ΔE 0.046
- Dark Sky Blue #448EE4 ΔE 0.047
- Dodger Blue #1E90FF ΔE 0.049
- Periwinkle Blue #8F99FB ΔE 0.061
- Lavender Blue #8B88F8 ΔE 0.067
- Perrywinkle #8F8CE7 ΔE 0.069
Use #5999FA 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.