#305ED3
Closest named color: Warm Blue (#4B57DB). oklch(52% 0.188 264.5), rgb(48, 94, 211).
Aa
White text reads best on this color (5.72:1).
About this color
#305ED3 is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.188 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.033 away. White text reads best on it, at 5.72:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.188) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.66:1 |
| White text | 5.72:1 |
Values
| HEX | #305ED3 |
| RGB | rgb(48, 94, 211) |
| HSL | hsl(223, 65%, 51%) |
| OKLCH | oklch(52% 0.188 264.5) |
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 #305ED3 | 5.72:1 | AA | Lc -83.4 | Fine for body text |
| Black text on #305ED3 | 3.66:1 | AA large text | Lc 26.0 | Dividers and decoration only |
| #305ED3 text on white | 5.72:1 | AA | Lc 78.1 | Fine for body text |
| #305ED3 text on black | 3.66:1 | AA large text | Lc -23.7 | 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
#A3C0FC
oklch(80.8% 0.091 264.4)
-
Step 400
400
#739DFB
oklch(70.7% 0.146 264.7)
-
Step 500
500
#4F81F8
oklch(63% 0.186 264.5)
-
Step 600
600
#3567E7
oklch(55.6% 0.202 264.5)
-
Step 700
700 (this color)
#305ED3
oklch(52% 0.188 264.5)
-
Step 800
800
#2246A2
oklch(42.6% 0.155 264.5)
-
Step 900
900
#203C81
oklch(37.7% 0.121 264.6)
-
Step 950
950
#13244B
oklch(27% 0.076 264.2)
#305ED3 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) | #006ED7 | 0.041 |
| Deuteranopia (no green cones) | #005FD1 | 0.023 |
| Tritanopia (no blue cones) | #007B8F | 0.147 |
| Achromatopsia (no color) | #666666 | 0.188 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305ED3
#305ED3
oklch(52% 0.188 264.5)
- #856300
#856300
oklch(52% 0.107 85)
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 #305ED3, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.033
- Azul #1D5DEC ΔE 0.040
- Royal Blue #4169E1 ΔE 0.040
- Neon Blue #4361EE ΔE 0.047
- Cerulean Blue #056EEE ΔE 0.055
- Mid Blue #276AB3 ΔE 0.062
- Iris #6258C4 ΔE 0.063
- Bright Blue #0165FC ΔE 0.065
Use #305ED3 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.