#2C3474
Closest named color: Marine Blue (#01386A). oklch(35.6% 0.109 274.1), rgb(44, 52, 116).
Aa
White text reads best on this color (11.34:1).
About this color
#2C3474 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.109 and its hue 274°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.044 away. White text reads best on it, at 11.34:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.85:1 |
| White text | 11.34:1 |
Values
| HEX | #2C3474 |
| RGB | rgb(44, 52, 116) |
| HSL | hsl(233, 45%, 31%) |
| OKLCH | oklch(35.6% 0.109 274.1) |
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 #2C3474 | 11.34:1 | AAA | Lc -99.7 | Preferred for body text |
| Black text on #2C3474 | 1.85:1 | Fails | Lc 8.0 | Not readable |
| #2C3474 text on white | 11.34:1 | AAA | Lc 95.9 | Preferred for body text |
| #2C3474 text on black | 1.85:1 | Fails | Lc 0.0 | 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
#E5E9FA
oklch(93.6% 0.023 275.4)
-
Step 200
200
#CFD8F8
oklch(88.5% 0.045 273)
-
Step 300
300
#B0BDF6
oklch(80.8% 0.082 274.5)
-
Step 400
400
#8899F2
oklch(70.7% 0.132 274.4)
-
Step 500
500
#6C7DED
oklch(63.1% 0.168 274.1)
-
Step 600
600
#5663DB
oklch(55.5% 0.182 274.2)
-
Step 700
700
#4751BE
oklch(49% 0.169 274.4)
-
Step 800
800
#3A439A
oklch(42.6% 0.141 274.3)
-
Step 900
900 (this color)
#2C3474
oklch(35.6% 0.109 274.1)
-
Step 950
950
#1D2248
oklch(27% 0.07 275)
#2C3474 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) | #0D3D76 | 0.036 |
| Deuteranopia (no green cones) | #003773 | 0.039 |
| Tritanopia (no blue cones) | #00434E | 0.096 |
| Achromatopsia (no color) | #3A3A3A | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C3474
#2C3474
oklch(35.6% 0.109 274.1)
- #493B00
#493B00
oklch(35.7% 0.073 93.9)
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 #2C3474, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.044
- Twilight Blue #0A437A ΔE 0.047
- Prussian Blue #1D3557 ΔE 0.056
- Marine #042E60 ΔE 0.060
- Dark Slate Blue #483D8B ΔE 0.065
- Cobalt #1E488F ΔE 0.067
- Midnight Blue #191970 ΔE 0.076
- Dark Grey Blue #29465B ΔE 0.076
Use #2C3474 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.