#305BDA
Closest named color: Warm Blue (#4B57DB). oklch(52% 0.2 265.5), rgb(48, 91, 218).
Aa
White text reads best on this color (5.77:1).
About this color
#305BDA is a medium-dark, vivid blue. In OKLCH its lightness is 52%, its chroma 0.200 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Warm Blue (#4B57DB), ΔE 0.028 away. White text reads best on it, at 5.77:1.
| Hue family | Blues |
| Lightness | medium-dark (52%) |
| Chroma | vivid (0.200) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.63:1 |
| White text | 5.77:1 |
Values
| HEX | #305BDA |
| RGB | rgb(48, 91, 218) |
| HSL | hsl(225, 70%, 52%) |
| OKLCH | oklch(52% 0.2 265.5) |
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 #305BDA | 5.77:1 | AA | Lc -83.6 | Fine for body text |
| Black text on #305BDA | 3.63:1 | AA large text | Lc 25.8 | Dividers and decoration only |
| #305BDA text on white | 5.77:1 | AA | Lc 78.3 | Fine for body text |
| #305BDA text on black | 3.63:1 | AA large text | Lc -23.5 | 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 700.
-
Step 50
50
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFD
oklch(93.6% 0.028 265.4)
-
Step 200
200
#C8D9FE
oklch(88.5% 0.054 265.8)
-
Step 300
300
#A3C0FF
oklch(80.9% 0.095 265.2)
-
Step 400
400
#739CFF
oklch(70.7% 0.152 265.7)
-
Step 500
500
#4F7FFF
oklch(63.1% 0.197 265.6)
-
Step 600
600
#3564EF
oklch(55.6% 0.216 265.5)
-
Step 700
700 (this color)
#305BDA
oklch(52% 0.2 265.5)
-
Step 800
800
#2244A8
oklch(42.7% 0.166 265.4)
-
Step 900
900
#203B85
oklch(37.8% 0.129 265.5)
-
Step 950
950
#13234E
oklch(27% 0.082 265.8)
#305BDA 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) | #006EDE | 0.046 |
| Deuteranopia (no green cones) | #005ED8 | 0.023 |
| Tritanopia (no blue cones) | #007B92 | 0.156 |
| Achromatopsia (no color) | #666666 | 0.201 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305BDA
#305BDA
oklch(52% 0.2 265.5)
- #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 #305BDA, closest first.
No curated palette has a color within ΔE 0.04 of #305BDA.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Warm Blue #4B57DB ΔE 0.028
- Azul #1D5DEC ΔE 0.030
- Neon Blue #4361EE ΔE 0.040
- Royal Blue #4169E1 ΔE 0.042
- Cerulean Blue #056EEE ΔE 0.053
- Bright Blue #0165FC ΔE 0.057
- Electric Blue #0652FF ΔE 0.063
- Iris #6258C4 ΔE 0.068
Use #305BDA 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.