#2C4280
Closest named color: Cobalt (#1E488F). oklch(39.6% 0.108 266.8), rgb(44, 66, 128).
Aa
White text reads best on this color (9.55:1).
About this color
#2C4280 is a dark, moderately saturated blue. In OKLCH its lightness is 40%, its chroma 0.108 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.029 away. White text reads best on it, at 9.55:1.
| Hue family | Blues |
| Lightness | dark (40%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.19:1 |
| White text | 9.55:1 |
Values
| HEX | #2C4280 |
| RGB | rgb(44, 66, 128) |
| HSL | hsl(224, 49%, 34%) |
| OKLCH | oklch(39.6% 0.108 266.8) |
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 #2C4280 | 9.55:1 | AAA | Lc -96.1 | Preferred for body text |
| Black text on #2C4280 | 2.19:1 | Fails | Lc 12.1 | Not readable |
| #2C4280 text on white | 9.55:1 | AAA | Lc 91.9 | Preferred for body text |
| #2C4280 text on black | 2.19:1 | Fails | Lc -10.5 | 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 900.
-
Step 50
50
#F2F5FD
oklch(97% 0.011 269.6)
-
Step 100
100
#E3EAFA
oklch(93.6% 0.023 266.9)
-
Step 200
200
#CCD9F8
oklch(88.5% 0.045 267.4)
-
Step 300
300
#A9C0F6
oklch(81% 0.081 266.7)
-
Step 400
400
#7C9DF1
oklch(70.7% 0.129 266.8)
-
Step 500
500
#5C82ED
oklch(63.1% 0.166 266.9)
-
Step 600
600
#4369DB
oklch(55.6% 0.18 266.6)
-
Step 700
700
#3656BE
oklch(49% 0.168 267)
-
Step 800
800
#2C479A
oklch(42.6% 0.139 266.8)
-
Step 900
900 (this color)
#2C4280
oklch(39.6% 0.108 266.8)
-
Step 950
950
#172448
oklch(27% 0.069 266.8)
#2C4280 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) | #234982 | 0.020 |
| Deuteranopia (no green cones) | #14427F | 0.023 |
| Tritanopia (no blue cones) | #00505A | 0.092 |
| Achromatopsia (no color) | #454545 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C4280
#2C4280
oklch(39.6% 0.108 266.8)
- #594300
#594300
oklch(39.6% 0.081 87.3)
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 #2C4280, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.029
- Twilight Blue #0A437A ΔE 0.030
- Light Navy #155084 ΔE 0.041
- Dark Slate Blue #483D8B ΔE 0.046
- Dusk Blue #26538D ΔE 0.050
- Blueberry #464196 ΔE 0.053
- Deep Sea Blue #015482 ΔE 0.055
- Marine Blue #01386A ΔE 0.063
Use #2C4280 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.