#305FD9
Closest named color: Warm Blue (#4B57DB). oklch(52.7% 0.194 264.6), rgb(48, 95, 217).
Aa
White text reads best on this color (5.57:1).
About this color
#305FD9 is a medium-dark, vivid blue. In OKLCH its lightness is 53%, its chroma 0.194 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.031 away. White text reads best on it, at 5.57:1.
| Hue family | Blues |
| Lightness | medium-dark (53%) |
| Chroma | vivid (0.194) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.76:1 |
| White text | 5.57:1 |
Values
| HEX | #305FD9 |
| RGB | rgb(48, 95, 217) |
| HSL | hsl(223, 69%, 52%) |
| OKLCH | oklch(52.7% 0.194 264.6) |
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 #305FD9 | 5.57:1 | AA | Lc -82.6 | Fine for body text |
| Black text on #305FD9 | 3.76:1 | AA large text | Lc 26.8 | Dividers and decoration only |
| #305FD9 text on white | 5.57:1 | AA | Lc 77.3 | Fine for body text |
| #305FD9 text on black | 3.76:1 | AA large text | Lc -24.5 | Dividers and decoration only |
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 600.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFB
oklch(93.5% 0.025 263.3)
-
Step 200
200
#C9D9FA
oklch(88.4% 0.049 264.9)
-
Step 300
300
#A5C0FA
oklch(80.9% 0.088 265.1)
-
Step 400
400
#759EF8
oklch(70.8% 0.14 264.6)
-
Step 500
500
#5282F4
oklch(63.1% 0.179 264.6)
-
Step 600
600 (this color)
#305FD9
oklch(52.7% 0.194 264.6)
-
Step 700
700
#2B56C5
oklch(49.1% 0.18 264.5)
-
Step 800
800
#24479F
oklch(42.7% 0.149 264.5)
-
Step 900
900
#213D7F
oklch(37.8% 0.117 264.2)
-
Step 950
950
#14244A
oklch(27% 0.074 264.7)
#305FD9 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) | #0070DD | 0.042 |
| Deuteranopia (no green cones) | #0060D7 | 0.022 |
| Tritanopia (no blue cones) | #007D93 | 0.151 |
| Achromatopsia (no color) | #686868 | 0.195 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305FD9
#305FD9
oklch(52.7% 0.194 264.6)
- #886500
#886500
oklch(52.8% 0.108 84.7)
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 #305FD9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.031
- Azul #1D5DEC ΔE 0.032
- Royal Blue #4169E1 ΔE 0.034
- Neon Blue #4361EE ΔE 0.038
- Cerulean Blue #056EEE ΔE 0.047
- Bright Blue #0165FC ΔE 0.056
- Dark Periwinkle #665FD1 ΔE 0.065
- Iris #6258C4 ΔE 0.066
Use #305FD9 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.