#356FBF
Closest named color: Windows Blue (#3778BF). oklch(54.4% 0.139 257.1), rgb(53, 111, 191).
Aa
White text reads best on this color (5.02:1).
About this color
#356FBF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 54%, its chroma 0.139 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Windows Blue (#3778BF), ΔE 0.026 away. White text reads best on it, at 5.02:1.
| Hue family | Blues |
| Lightness | medium-dark (54%) |
| Chroma | moderately saturated (0.139) |
| Temperature | cool |
| Nearest name | Windows Blue (#3778BF) |
| Black text | 4.17:1 |
| White text | 5.02:1 |
Values
| HEX | #356FBF |
| RGB | rgb(53, 111, 191) |
| HSL | hsl(215, 57%, 48%) |
| OKLCH | oklch(54.4% 0.139 257.1) |
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 #356FBF | 5.02:1 | AA | Lc -79.8 | Fine for body text |
| Black text on #356FBF | 4.17:1 | AA large text | Lc 29.7 | Dividers and decoration only |
| #356FBF text on white | 5.02:1 | AA | Lc 74.4 | Content text, not long reading |
| #356FBF text on black | 4.17:1 | AA large text | Lc -27.3 | 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 600.
-
Step 50
50
#F2F6FB
oklch(97.2% 0.008 253.9)
-
Step 100
100
#E2EBF6
oklch(93.7% 0.018 253.3)
-
Step 200
200
#CBDAF1
oklch(88.4% 0.036 258.9)
-
Step 300
300
#A7C3E9
oklch(80.9% 0.062 256.1)
-
Step 400
400
#78A3DF
oklch(70.8% 0.1 256.8)
-
Step 500
500
#558AD6
oklch(63.1% 0.128 257.5)
-
Step 600
600 (this color)
#356FBF
oklch(54.4% 0.139 257.1)
-
Step 700
700
#2B60A8
oklch(49.1% 0.129 256.9)
-
Step 800
800
#254E88
oklch(42.6% 0.107 257.5)
-
Step 900
900
#23426D
oklch(37.8% 0.083 257)
-
Step 950
950
#152740
oklch(27.1% 0.053 256.9)
#356FBF 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) | #4976C2 | 0.029 |
| Deuteranopia (no green cones) | #3169BD | 0.017 |
| Tritanopia (no blue cones) | #00828D | 0.110 |
| Achromatopsia (no color) | #6F6F6F | 0.139 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #356FBF
#356FBF
oklch(54.4% 0.139 257.1)
- #946500
#946500
oklch(54.3% 0.114 76.9)
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 #356FBF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Windows Blue #3778BF ΔE 0.026
- Mid Blue #276AB3 ΔE 0.026
- French Blue #436BAD ΔE 0.030
- Flat Blue #3C73A8 ΔE 0.041
- Nice Blue #107AB0 ΔE 0.046
- Muted Blue #3B719F ΔE 0.052
- Royal Blue #4169E1 ΔE 0.058
- Steel Blue #4682B4 ΔE 0.064
Use #356FBF 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.