#2E3C7B
Closest named color: Twilight Blue (#0A437A). oklch(38% 0.108 271), rgb(46, 60, 123).
Aa
White text reads best on this color (10.25:1).
About this color
#2E3C7B is a dark, moderately saturated blue. In OKLCH its lightness is 38%, its chroma 0.108 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.034 away. White text reads best on it, at 10.25:1.
| Hue family | Blues |
| Lightness | dark (38%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.04:1 |
| White text | 10.25:1 |
Values
| HEX | #2E3C7B |
| RGB | rgb(46, 60, 123) |
| HSL | hsl(229, 46%, 33%) |
| OKLCH | oklch(38% 0.108 271) |
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 #2E3C7B | 10.25:1 | AAA | Lc -97.6 | Preferred for body text |
| Black text on #2E3C7B | 2.04:1 | Fails | Lc 10.4 | Not readable |
| #2E3C7B text on white | 10.25:1 | AAA | Lc 93.6 | Preferred for body text |
| #2E3C7B text on black | 2.04:1 | Fails | Lc -9.0 | 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 900.
-
Step 50
50
#F3F5FD
oklch(97.1% 0.011 274.9)
-
Step 100
100
#E4E9FA
oklch(93.5% 0.024 272.8)
-
Step 200
200
#CED8F8
oklch(88.5% 0.045 271.7)
-
Step 300
300
#ADBEF6
oklch(80.8% 0.082 271.4)
-
Step 400
400
#839BF1
oklch(70.7% 0.129 271)
-
Step 500
500
#667FEC
oklch(63% 0.165 271.2)
-
Step 600
600
#4F66DB
oklch(55.7% 0.18 271)
-
Step 700
700
#4054BE
oklch(49.2% 0.167 270.9)
-
Step 800
800
#354599
oklch(42.6% 0.138 271.2)
-
Step 900
900 (this color)
#2E3C7B
oklch(38% 0.108 271)
-
Step 950
950
#1A2347
oklch(26.9% 0.068 270.7)
#2E3C7B 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) | #1B447D | 0.027 |
| Deuteranopia (no green cones) | #0C3E7A | 0.031 |
| Tritanopia (no blue cones) | #004A55 | 0.094 |
| Achromatopsia (no color) | #414141 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2E3C7B
#2E3C7B
oklch(38% 0.108 271)
- #524000
#524000
oklch(38% 0.078 90.6)
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 #2E3C7B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.034
- Cobalt #1E488F ΔE 0.045
- Dark Slate Blue #483D8B ΔE 0.049
- Marine Blue #01386A ΔE 0.053
- Light Navy #155084 ΔE 0.058
- Blueberry #464196 ΔE 0.060
- Dusk Blue #26538D ΔE 0.068
- Dark Grey Blue #29465B ΔE 0.069
Use #2E3C7B 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.