#305DD1
Closest named color: Warm Blue (#4B57DB). oklch(51.7% 0.186 264.6), rgb(48, 93, 209).
Aa
White text reads best on this color (5.81:1).
About this color
#305DD1 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.186 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.034 away. White text reads best on it, at 5.81:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.186) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.61:1 |
| White text | 5.81:1 |
Values
| HEX | #305DD1 |
| RGB | rgb(48, 93, 209) |
| HSL | hsl(223, 64%, 50%) |
| OKLCH | oklch(51.7% 0.186 264.6) |
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 #305DD1 | 5.81:1 | AA | Lc -83.8 | Fine for body text |
| Black text on #305DD1 | 3.61:1 | AA large text | Lc 25.5 | Dividers and decoration only |
| #305DD1 text on white | 5.81:1 | AA | Lc 78.5 | Fine for body text |
| #305DD1 text on black | 3.61:1 | AA large text | Lc -23.3 | 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 700.
-
Step 50
50
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#E1EAFC
oklch(93.6% 0.026 264.4)
-
Step 200
200
#C9D9FB
oklch(88.4% 0.05 265.4)
-
Step 300
300
#A4C0FC
oklch(80.9% 0.091 265)
-
Step 400
400
#739DFA
oklch(70.6% 0.144 264.6)
-
Step 500
500
#5081F7
oklch(63% 0.184 264.7)
-
Step 600
600
#3667E6
oklch(55.5% 0.2 264.7)
-
Step 700
700 (this color)
#305DD1
oklch(51.7% 0.186 264.6)
-
Step 800
800
#2346A2
oklch(42.7% 0.155 264.8)
-
Step 900
900
#203C80
oklch(37.6% 0.12 264.5)
-
Step 950
950
#13244B
oklch(27% 0.076 264.2)
#305DD1 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) | #006DD5 | 0.041 |
| Deuteranopia (no green cones) | #005ECF | 0.023 |
| Tritanopia (no blue cones) | #007A8E | 0.146 |
| Achromatopsia (no color) | #656565 | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305DD1
#305DD1
oklch(51.7% 0.186 264.6)
- #846200
#846200
oklch(51.7% 0.106 84.8)
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 #305DD1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.034
- Azul #1D5DEC ΔE 0.043
- Royal Blue #4169E1 ΔE 0.044
- Neon Blue #4361EE ΔE 0.050
- Cerulean Blue #056EEE ΔE 0.058
- Mid Blue #276AB3 ΔE 0.061
- Iris #6258C4 ΔE 0.063
- Dark Periwinkle #665FD1 ΔE 0.066
Use #305DD1 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.