#2C357E
Closest named color: Twilight Blue (#0A437A). oklch(36.6% 0.123 273.4), rgb(44, 53, 126).
Aa
White text reads best on this color (10.95:1).
About this color
#2C357E is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.123 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.046 away. White text reads best on it, at 10.95:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.123) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.91:1 |
| White text | 10.95:1 |
Values
| HEX | #2C357E |
| RGB | rgb(44, 53, 126) |
| HSL | hsl(233, 48%, 33%) |
| OKLCH | oklch(36.6% 0.123 273.4) |
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 #2C357E | 10.95:1 | AAA | Lc -98.9 | Preferred for body text |
| Black text on #2C357E | 1.91:1 | Fails | Lc 8.9 | Not readable |
| #2C357E text on white | 10.95:1 | AAA | Lc 95.0 | Preferred for body text |
| #2C357E text on black | 1.91:1 | Fails | Lc -7.6 | 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
#F3F5FE
oklch(97.1% 0.012 276.1)
-
Step 100
100
#E4E9FC
oklch(93.6% 0.026 274.1)
-
Step 200
200
#CED8FC
oklch(88.6% 0.051 273.1)
-
Step 300
300
#ADBDFD
oklch(80.9% 0.092 273.3)
-
Step 400
400
#8498FC
oklch(70.8% 0.148 273.5)
-
Step 500
500
#687AF9
oklch(63% 0.189 273.7)
-
Step 600
600
#525FE8
oklch(55.5% 0.205 273.6)
-
Step 700
700
#434ECA
oklch(49.2% 0.19 273.3)
-
Step 800
800
#3741A3
oklch(42.8% 0.157 273.4)
-
Step 900
900 (this color)
#2C357E
oklch(36.6% 0.123 273.4)
-
Step 950
950
#1B224C
oklch(27.1% 0.078 273)
#2C357E 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) | #004080 | 0.041 |
| Deuteranopia (no green cones) | #00397D | 0.037 |
| Tritanopia (no blue cones) | #004654 | 0.103 |
| Achromatopsia (no color) | #3C3C3C | 0.123 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C357E
#2C357E
oklch(36.6% 0.123 273.4)
- #4C3D00
#4C3D00
oklch(36.5% 0.075 93.2)
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 #2C357E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.046
- Marine Blue #01386A ΔE 0.053
- Dark Slate Blue #483D8B ΔE 0.055
- Cobalt #1E488F ΔE 0.056
- Blueberry #464196 ΔE 0.066
- Marine #042E60 ΔE 0.072
- Prussian Blue #1D3557 ΔE 0.072
- Light Navy #155084 ΔE 0.075
Use #2C357E 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.