#5199FF
Closest named color: Chefchaouen Blue (#4895EF). oklch(68.5% 0.167 257.5), rgb(81, 153, 255).
Aa
Black text reads best on this color (7.35:1).
About this color
#5199FF is a medium-light, vivid blue. In OKLCH its lightness is 68%, its chroma 0.167 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Chefchaouen Blue (#4895EF), ΔE 0.027 away. Black text reads best on it, at 7.35:1.
| Hue family | Blues |
| Lightness | medium-light (68%) |
| Chroma | vivid (0.167) |
| Temperature | cool |
| Nearest name | Chefchaouen Blue (#4895EF) |
| Black text | 7.35:1 |
| White text | 2.85:1 |
Values
| HEX | #5199FF |
| RGB | rgb(81, 153, 255) |
| HSL | hsl(215, 100%, 66%) |
| OKLCH | oklch(68.5% 0.167 257.5) |
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 #5199FF | 2.85:1 | Fails | Lc -59.7 | Large or bold text, headings |
| Black text on #5199FF | 7.35:1 | AAA | Lc 49.7 | Large or bold text, headings |
| #5199FF text on white | 2.85:1 | Fails | Lc 54.4 | Large or bold text, headings |
| #5199FF text on black | 7.35:1 | 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
#DEEBFF
oklch(93.6% 0.031 258.9)
-
Step 200
200
#C2DBFF
oklch(88.5% 0.057 257.5)
-
Step 300
300
#99C3FF
oklch(80.9% 0.097 257.3)
-
Step 400
400 (this color)
#5199FF
oklch(68.5% 0.167 257.5)
-
Step 500
500
#2985FF
oklch(63.1% 0.2 257.5)
-
Step 600
600
#006DE5
oklch(55.6% 0.201 257.4)
-
Step 700
700
#005BC2
oklch(49% 0.177 257.5)
-
Step 800
800
#004AA1
oklch(42.6% 0.155 257.6)
-
Step 900
900
#003E88
oklch(37.8% 0.136 257.4)
-
Step 950
950
#042550
oklch(27% 0.088 256.9)
#5199FF 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) | #6AA2FF | 0.036 |
| Deuteranopia (no green cones) | #4E91FD | 0.021 |
| Tritanopia (no blue cones) | #00B1C0 | 0.133 |
| Achromatopsia (no color) | #999999 | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5199FF
#5199FF
oklch(68.5% 0.167 257.5)
- #CA8C00
#CA8C00
oklch(68.4% 0.143 77.3)
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 #5199FF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Chefchaouen Blue #4895EF ΔE 0.027
- Cornflower Blue #6495ED ΔE 0.030
- Dodger Blue #1E90FF ΔE 0.042
- Dark Sky Blue #448EE4 ΔE 0.049
- Soft Blue #6488EA ΔE 0.049
- Periwinkle Blue #8F99FB ΔE 0.068
- Lavender Blue #8B88F8 ΔE 0.072
- Perrywinkle #8F8CE7 ΔE 0.076
Use #5199FF 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.