#305CD0
Closest named color: Warm Blue (#4B57DB). oklch(51.4% 0.186 264.8), rgb(48, 92, 208).
Aa
White text reads best on this color (5.88:1).
About this color
#305CD0 is a medium-dark, vivid blue. In OKLCH its lightness is 51%, 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 5.88:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | vivid (0.186) |
| Temperature | cool |
| Nearest name | Warm Blue (#4B57DB) |
| Black text | 3.56:1 |
| White text | 5.88:1 |
Values
| HEX | #305CD0 |
| RGB | rgb(48, 92, 208) |
| HSL | hsl(224, 63%, 50%) |
| OKLCH | oklch(51.4% 0.186 264.8) |
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 #305CD0 | 5.88:1 | AA | Lc -84.1 | Fine for body text |
| Black text on #305CD0 | 3.56:1 | AA large text | Lc 25.2 | Dividers and decoration only |
| #305CD0 text on white | 5.88:1 | AA | Lc 78.9 | Fine for body text |
| #305CD0 text on black | 3.56:1 | AA large text | Lc -22.9 | 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
#749DFA
oklch(70.7% 0.144 265)
-
Step 500
500
#5181F7
oklch(63% 0.184 264.9)
-
Step 600
600
#3767E6
oklch(55.6% 0.2 264.9)
-
Step 700
700 (this color)
#305CD0
oklch(51.4% 0.186 264.8)
-
Step 800
800
#2346A2
oklch(42.7% 0.155 264.8)
-
Step 900
900
#213C80
oklch(37.6% 0.12 264.9)
-
Step 950
950
#13244B
oklch(27% 0.076 264.2)
#305CD0 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) | #006CD4 | 0.041 |
| Deuteranopia (no green cones) | #005DCE | 0.023 |
| Tritanopia (no blue cones) | #00798D | 0.146 |
| Achromatopsia (no color) | #646464 | 0.186 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #305CD0
#305CD0
oklch(51.4% 0.186 264.8)
- #836100
#836100
oklch(51.4% 0.105 84.5)
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 #305CD0, 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 0.044
- Royal Blue #4169E1 ΔE 0.046
- Neon Blue #4361EE ΔE 0.052
- Cerulean Blue #056EEE ΔE 0.061
- Mid Blue #276AB3 ΔE 0.062
- Iris #6258C4 ΔE 0.063
- Blue Blue #2242C7 ΔE 0.066
Use #305CD0 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.