#909FDB
Closest named color: Periwinkle Blue (#8F99FB). oklch(71.3% 0.089 273.1), rgb(144, 159, 219).
Aa
Black text reads best on this color (8.16:1).
About this color
#909FDB is a medium-light, moderately saturated blue. In OKLCH its lightness is 71%, its chroma 0.089 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Periwinkle Blue (#8F99FB), ΔE 0.054 away. Black text reads best on it, at 8.16:1.
| Hue family | Blues |
| Lightness | medium-light (71%) |
| Chroma | moderately saturated (0.089) |
| Temperature | cool |
| Nearest name | Periwinkle Blue (#8F99FB) |
| Black text | 8.16:1 |
| White text | 2.57:1 |
Values
| HEX | #909FDB |
| RGB | rgb(144, 159, 219) |
| HSL | hsl(228, 51%, 71%) |
| OKLCH | oklch(71.3% 0.089 273.1) |
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 #909FDB | 2.57:1 | Fails | Lc -55.4 | Large or bold text, headings |
| Black text on #909FDB | 8.16:1 | AAA | Lc 53.8 | Large or bold text, headings |
| #909FDB text on white | 2.57:1 | Fails | Lc 50.3 | Large or bold text, headings |
| #909FDB text on black | 8.16:1 | AAA | Lc -51.7 | 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
#F4F5FB
oklch(97.1% 0.008 278.6)
-
Step 100
100
#E6E9F5
oklch(93.5% 0.016 274.8)
-
Step 200
200
#D2D8EE
oklch(88.4% 0.031 273.6)
-
Step 300
300
#B4BFE6
oklch(80.9% 0.056 272.7)
-
Step 400
400 (this color)
#909FDB
oklch(71.3% 0.089 273.1)
-
Step 500
500
#7384CE
oklch(63.1% 0.113 272.9)
-
Step 600
600
#5C6CBB
oklch(55.5% 0.124 273.1)
-
Step 700
700
#4C5AA2
oklch(49.2% 0.116 273.1)
-
Step 800
800
#3E4A83
oklch(42.7% 0.095 272.8)
-
Step 900
900
#353E69
oklch(37.7% 0.074 273.4)
-
Step 950
950
#1F253D
oklch(27.1% 0.046 272.4)
#909FDB 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) | #8CA5DE | 0.016 |
| Deuteranopia (no green cones) | #869FDA | 0.013 |
| Tritanopia (no blue cones) | #7BABB4 | 0.080 |
| Achromatopsia (no color) | #A1A1A1 | 0.090 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #909FDB
#909FDB
oklch(71.3% 0.089 273.1)
- #B6A25F
#B6A25F
oklch(71.5% 0.09 93.3)
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 #909FDB, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Periwinkle Blue #8F99FB ΔE 0.054
- Perrywinkle #8F8CE7 ΔE 0.058
- Pale Purple #B790D4 ΔE 0.063
- Cool Gray #8D99AE ΔE 0.066
- Bluey Grey #89A0B0 ΔE 0.067
- Bluegrey #85A3B2 ΔE 0.068
- Cornflower Blue #6495ED ΔE 0.069
- Greyblue #77A1B5 ΔE 0.069
Use #909FDB 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.