#3A55B2
Closest named color: Mid Blue (#276AB3). oklch(48.1% 0.151 268.1), rgb(58, 85, 178).
Aa
White text reads best on this color (6.72:1).
About this color
#3A55B2 is a medium-dark, vivid blue. In OKLCH its lightness is 48%, its chroma 0.151 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.056 away. White text reads best on it, at 6.72:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | vivid (0.151) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.12:1 |
| White text | 6.72:1 |
Values
| HEX | #3A55B2 |
| RGB | rgb(58, 85, 178) |
| HSL | hsl(227, 51%, 46%) |
| OKLCH | oklch(48.1% 0.151 268.1) |
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 #3A55B2 | 6.72:1 | AA | Lc -87.9 | Fine for body text |
| Black text on #3A55B2 | 3.12:1 | AA large text | Lc 21.2 | Dividers and decoration only |
| #3A55B2 text on white | 6.72:1 | AA | Lc 82.8 | Fine for body text |
| #3A55B2 text on black | 3.12:1 | AA large text | Lc -19.1 | 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
#F2F5FC
oklch(97% 0.01 267.4)
-
Step 100
100
#E4EAF9
oklch(93.7% 0.021 268.4)
-
Step 200
200
#CED9F5
oklch(88.6% 0.04 268.5)
-
Step 300
300
#ACC0F1
oklch(81% 0.073 267.4)
-
Step 400
400
#819DEA
oklch(70.6% 0.118 268.1)
-
Step 500
500
#6383E3
oklch(63.1% 0.149 268.1)
-
Step 600
600
#4B6AD1
oklch(55.5% 0.162 268.2)
-
Step 700
700 (this color)
#3A55B2
oklch(48.1% 0.151 268.1)
-
Step 800
800
#324893
oklch(42.6% 0.126 268.3)
-
Step 900
900
#2C3D75
oklch(37.7% 0.098 268.7)
-
Step 950
950
#1A2444
oklch(26.9% 0.061 268.9)
#3A55B2 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) | #1B61B5 | 0.036 |
| Deuteranopia (no green cones) | #0056B0 | 0.037 |
| Tritanopia (no blue cones) | #006B7B | 0.125 |
| Achromatopsia (no color) | #5C5C5C | 0.151 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #3A55B2
#3A55B2
oklch(48.1% 0.151 268.1)
- #755A00
#755A00
oklch(48.2% 0.098 88.3)
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 #3A55B2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.056
- Denim Blue #3B5B92 ΔE 0.057
- Dusky Blue #475F94 ΔE 0.062
- Iris #6258C4 ΔE 0.063
- French Blue #436BAD ΔE 0.064
- Blue Blue #2242C7 ΔE 0.064
- Blueberry #464196 ΔE 0.065
- Dusk Blue #26538D ΔE 0.065
Use #3A55B2 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.