#2E3FA5
Closest named color: Sapphire (#2138AB). oklch(42.1% 0.164 270.4), rgb(46, 63, 165).
Aa
White text reads best on this color (8.85:1).
About this color
#2E3FA5 is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.164 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.025 away. White text reads best on it, at 8.85:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.164) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.37:1 |
| White text | 8.85:1 |
Values
| HEX | #2E3FA5 |
| RGB | rgb(46, 63, 165) |
| HSL | hsl(231, 56%, 41%) |
| OKLCH | oklch(42.1% 0.164 270.4) |
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 #2E3FA5 | 8.85:1 | AAA | Lc -94.2 | Preferred for body text |
| Black text on #2E3FA5 | 2.37:1 | Fails | Lc 14.2 | Not readable |
| #2E3FA5 text on white | 8.85:1 | AAA | Lc 89.7 | Fine for body text |
| #2E3FA5 text on black | 2.37:1 | Fails | Lc -12.5 | Not readable |
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 800.
-
Step 50
50
#F2F5FE
oklch(97% 0.012 271.3)
-
Step 100
100
#E2E9FD
oklch(93.5% 0.028 270.4)
-
Step 200
200
#CBD8FD
oklch(88.4% 0.053 270)
-
Step 300
300
#A9BEFF
oklch(80.9% 0.095 270.4)
-
Step 400
400
#7D99FF
oklch(70.7% 0.152 270.5)
-
Step 500
500
#5E7BFE
oklch(63% 0.197 270.4)
-
Step 600
600
#4860EE
oklch(55.7% 0.214 270.5)
-
Step 700
700
#3A4ECF
oklch(49.1% 0.199 270.4)
-
Step 800
800 (this color)
#2E3FA5
oklch(42.1% 0.164 270.4)
-
Step 900
900
#293984
oklch(37.8% 0.127 270.1)
-
Step 950
950
#18224D
oklch(27% 0.08 270.4)
#2E3FA5 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) | #0050A8 | 0.046 |
| Deuteranopia (no green cones) | #0045A3 | 0.032 |
| Tritanopia (no blue cones) | #00596C | 0.131 |
| Achromatopsia (no color) | #4A4A4A | 0.165 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2E3FA5
#2E3FA5
oklch(42.1% 0.164 270.4)
- #5F4A00
#5F4A00
oklch(41.9% 0.086 90)
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 #2E3FA5, closest first.
No curated palette has a color within ΔE 0.04 of #2E3FA5.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.025
- Blueberry #464196 ΔE 0.042
- Cobalt #1E488F ΔE 0.046
- Blue Blue #2242C7 ΔE 0.056
- Dark Slate Blue #483D8B ΔE 0.056
- Majorelle Blue #3F37C9 ΔE 0.062
- Indigo Blue #3A18B1 ΔE 0.068
- Dusk Blue #26538D ΔE 0.069
Use #2E3FA5 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.