#5999F2
Closest named color: Cornflower Blue (#6495ED). oklch(68.1% 0.148 257), rgb(89, 153, 242).
Aa
Black text reads best on this color (7.26:1).
About this color
#5999F2 is a medium-light, vivid blue. In OKLCH its lightness is 68%, its chroma 0.148 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Cornflower Blue (#6495ED), ΔE 0.014 away. Black text reads best on it, at 7.26:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.148) |
| Temperature | cool |
| Nearest name | Cornflower Blue (#6495ED) |
| Black text | 7.26:1 |
| White text | 2.89:1 |
Values
| HEX | #5999F2 |
| RGB | rgb(89, 153, 242) |
| HSL | hsl(215, 85%, 65%) |
| OKLCH | oklch(68.1% 0.148 257) |
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 #5999F2 | 2.89:1 | Fails | Lc -60.3 | Content text, not long reading |
| Black text on #5999F2 | 7.26:1 | AAA | Lc 49.1 | Large or bold text, headings |
| #5999F2 text on white | 2.89:1 | Fails | Lc 54.9 | Large or bold text, headings |
| #5999F2 text on black | 7.26:1 | AAA | Lc -46.9 | 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
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C4DBFC
oklch(88.5% 0.052 257.4)
-
Step 300
300
#9AC3FC
oklch(80.9% 0.092 256.7)
-
Step 400
400 (this color)
#5999F2
oklch(68.1% 0.148 257)
-
Step 500
500
#3087F9
oklch(63.2% 0.189 257)
-
Step 600
600
#006EE3
oklch(55.7% 0.197 256.9)
-
Step 700
700
#005CC0
oklch(49.1% 0.174 256.9)
-
Step 800
800
#004B9F
oklch(42.7% 0.151 256.9)
-
Step 900
900
#0A3F81
oklch(37.7% 0.123 257)
-
Step 950
950
#09264C
oklch(27.1% 0.078 256.8)
#5999F2 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) | #72A0F6 | 0.034 |
| Deuteranopia (no green cones) | #5D91F0 | 0.021 |
| Tritanopia (no blue cones) | #00ADBA | 0.121 |
| Achromatopsia (no color) | #989898 | 0.148 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5999F2
#5999F2
oklch(68.1% 0.148 257)
- #C98B00
#C98B00
oklch(68.1% 0.142 77.1)
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 #5999F2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cornflower Blue #6495ED ΔE 0.014
- Chefchaouen Blue #4895EF ΔE 0.020
- Dark Sky Blue #448EE4 ΔE 0.041
- Soft Blue #6488EA ΔE 0.044
- Dodger Blue #1E90FF ΔE 0.052
- Periwinkle Blue #8F99FB ΔE 0.064
- Perrywinkle #8F8CE7 ΔE 0.067
- Lavender Blue #8B88F8 ΔE 0.070
Use #5999F2 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.