#305BD1
Closest named color: Warm Blue (#4B57DB). oklch(51.3% 0.189 265.1), rgb(48, 91, 209).
Aa
White text reads best on this color (5.92:1).
About this color
#305BD1 is a medium-dark, vivid blue. In OKLCH its lightness is 51%, its chroma 0.189 and its hue 265°. 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 5.92:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.189) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.54:1 |
| White text | 5.92:1 |
Values
| HEX | #305BD1 |
| RGB | rgb(48, 91, 209) |
| HSL | hsl(224, 64%, 50%) |
| OKLCH | oklch(51.3% 0.189 265.1) |
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 #305BD1 | 5.92:1 | AA | Lc -84.3 | Fine for body text |
| Black text on #305BD1 | 3.54:1 | AA large text | Lc 25.0 | Dividers and decoration only |
| #305BD1 text on white | 5.92:1 | AA | Lc 79.1 | Fine for body text |
| #305BD1 text on black | 3.54:1 | AA large text | Lc -22.7 | 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
#C9D9FC
oklch(88.5% 0.051 265.9)
-
Step 300
300
#A4C0FC
oklch(80.9% 0.091 265)
-
Step 400
400
#749DFB
oklch(70.7% 0.145 265.1)
-
Step 500
500
#5181F9
oklch(63.2% 0.187 265.1)
-
Step 600
600
#3766E8
oklch(55.5% 0.204 265.2)
-
Step 700
700 (this color)
#305BD1
oklch(51.3% 0.189 265.1)
-
Step 800
800
#2446A3
oklch(42.8% 0.156 265.1)
-
Step 900
900
#213C81
oklch(37.7% 0.121 265)
-
Step 950
950
#14244C
oklch(27.1% 0.077 265.2)
#305BD1 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) | #006CD5 | 0.043 |
| Deuteranopia (no green cones) | #005DCF | 0.023 |
| Tritanopia (no blue cones) | #00788D | 0.147 |
| Achromatopsia (no color) | #646464 | 0.189 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305BD1
#305BD1
oklch(51.3% 0.189 265.1)
- #826100
#826100
oklch(51.2% 0.105 85.3)
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 #305BD1, closest first.
No curated palette has a color within ΔE 0.04 of #305BD1.
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 0.043
- Royal Blue #4169E1 ΔE 0.047
- Neon Blue #4361EE ΔE 0.052
- Cerulean Blue #056EEE ΔE 0.062
- Iris #6258C4 ΔE 0.063
- Blue Blue #2242C7 ΔE 0.064
- Mid Blue #276AB3 ΔE 0.064
Use #305BD1 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.