#355DB1
Closest named color: Mid Blue (#276AB3). oklch(49.5% 0.141 263.1), rgb(53, 93, 177).
Aa
White text reads best on this color (6.26:1).
About this color
#355DB1 is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.141 and its hue 263°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.035 away. White text reads best on it, at 6.26:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.141) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.35:1 |
| White text | 6.26:1 |
Values
| HEX | #355DB1 |
| RGB | rgb(53, 93, 177) |
| HSL | hsl(221, 54%, 45%) |
| OKLCH | oklch(49.5% 0.141 263.1) |
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 #355DB1 | 6.26:1 | AA | Lc -86.0 | Fine for body text |
| Black text on #355DB1 | 3.35:1 | AA large text | Lc 23.2 | Dividers and decoration only |
| #355DB1 text on white | 6.26:1 | AA | Lc 80.9 | Fine for body text |
| #355DB1 text on black | 3.35:1 | AA large text | Lc -21.0 | 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
#F2F6FC
oklch(97.2% 0.009 258.3)
-
Step 100
100
#E3EAF8
oklch(93.6% 0.02 264.5)
-
Step 200
200
#CCDAF3
oklch(88.6% 0.038 262.1)
-
Step 300
300
#AAC1EE
oklch(80.9% 0.069 263.7)
-
Step 400
400
#7CA0E5
oklch(70.7% 0.109 262.8)
-
Step 500
500
#5C87DD
oklch(63.2% 0.138 263)
-
Step 600
600
#426ECB
oklch(55.5% 0.152 263.3)
-
Step 700
700 (this color)
#355DB1
oklch(49.5% 0.141 263.1)
-
Step 800
800
#2B4B8E
oklch(42.6% 0.117 263.1)
-
Step 900
900
#274072
oklch(37.8% 0.091 262.8)
-
Step 950
950
#172642
oklch(27.1% 0.056 262)
#355DB1 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) | #3166B4 | 0.024 |
| Deuteranopia (no green cones) | #145BAF | 0.026 |
| Tritanopia (no blue cones) | #00717E | 0.115 |
| Achromatopsia (no color) | #606060 | 0.141 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #355DB1
#355DB1
oklch(49.5% 0.141 263.1)
- #7E5B00
#7E5B00
oklch(49.5% 0.102 82.4)
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 #355DB1, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.035
- French Blue #436BAD ΔE 0.045
- Denim Blue #3B5B92 ΔE 0.049
- Dusky Blue #475F94 ΔE 0.051
- Peacock Blue #016795 ΔE 0.064
- Dusk Blue #26538D ΔE 0.065
- Denim #3B638C ΔE 0.066
- Iris #6258C4 ΔE 0.066
Use #355DB1 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.