#0356B9
Closest named color: Blue Blue (#2242C7). oklch(47.3% 0.171 257.8), rgb(3, 86, 185).
Aa
White text reads best on this color (6.91:1).
About this color
#0356B9 is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.171 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Blue Blue (#2242C7), ΔE 0.051 away. White text reads best on it, at 6.91:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.171) |
| Temperature | cool |
| Nearest name | Blue Blue (#2242C7) |
| Black text | 3.03:1 |
| White text | 6.91:1 |
Values
| HEX | #0356B9 |
| RGB | rgb(3, 86, 185) |
| HSL | hsl(213, 97%, 37%) |
| OKLCH | oklch(47.3% 0.171 257.8) |
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 #0356B9 | 6.91:1 | AA | Lc -88.1 | Fine for body text |
| Black text on #0356B9 | 3.03:1 | AA large text | Lc 20.9 | Dividers and decoration only |
| #0356B9 text on white | 6.91:1 | AA | Lc 83.1 | Fine for body text |
| #0356B9 text on black | 3.03:1 | AA large text | Lc -18.8 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C7DBF8
oklch(88.6% 0.046 257.6)
-
Step 300
300
#9FC3F6
oklch(80.9% 0.082 257.1)
-
Step 400
400
#6AA1F2
oklch(70.6% 0.133 257.9)
-
Step 500
500
#4088EE
oklch(63.2% 0.17 257.6)
-
Step 600
600
#1C6FDC
oklch(55.7% 0.184 257.6)
-
Step 700
700 (this color)
#0356B9
oklch(47.3% 0.171 257.8)
-
Step 800
800
#104B9B
oklch(42.6% 0.143 258.1)
-
Step 900
900
#16407B
oklch(37.7% 0.111 257.8)
-
Step 950
950
#0E2648
oklch(27% 0.07 257.6)
#0356B9 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) | #0062BD | 0.032 |
| Deuteranopia (no green cones) | #0053B7 | 0.009 |
| Tritanopia (no blue cones) | #006F7F | 0.130 |
| Achromatopsia (no color) | #5A5A5A | 0.172 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0356B9
#0356B9
oklch(47.3% 0.171 257.8)
- #7A5300
#7A5300
oklch(47.3% 0.099 77.4)
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 #0356B9, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Blue Blue #2242C7 ΔE 0.051
- Mid Blue #276AB3 ΔE 0.062
- Dusk Blue #26538D ΔE 0.071
- Sapphire #2138AB ΔE 0.074
- Cobalt #1E488F ΔE 0.074
- Denim Blue #3B5B92 ΔE 0.075
- Majorelle Blue #3F37C9 ΔE 0.077
- Warm Blue #4B57DB ΔE 0.079
Use #0356B9 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.