#2C459F
Closest named color: Cobalt (#1E488F). oklch(42.6% 0.149 267.8), rgb(44, 69, 159).
Aa
White text reads best on this color (8.54:1).
About this color
#2C459F is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.149 and its hue 268°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.031 away. White text reads best on it, at 8.54:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.149) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.45:1 |
| White text | 8.54:1 |
Values
| HEX | #2C459F |
| RGB | rgb(44, 69, 159) |
| HSL | hsl(227, 57%, 40%) |
| OKLCH | oklch(42.6% 0.149 267.8) |
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 #2C459F | 8.54:1 | AAA | Lc -93.5 | Preferred for body text |
| Black text on #2C459F | 2.45:1 | Fails | Lc 15.1 | Dividers and decoration only |
| #2C459F text on white | 8.54:1 | AAA | Lc 88.9 | Fine for body text |
| #2C459F text on black | 2.45:1 | Fails | Lc -13.3 | 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
#E2EAFB
oklch(93.6% 0.025 265.6)
-
Step 200
200
#CBD9FA
oklch(88.5% 0.048 267.2)
-
Step 300
300
#A8BFFA
oklch(80.9% 0.088 267.9)
-
Step 400
400
#7B9CF7
oklch(70.7% 0.139 267.7)
-
Step 500
500
#5B80F4
oklch(63.1% 0.178 267.8)
-
Step 600
600
#4366E3
oklch(55.6% 0.194 267.7)
-
Step 700
700
#3554C5
oklch(49.2% 0.18 267.6)
-
Step 800
800 (this color)
#2C459F
oklch(42.6% 0.149 267.8)
-
Step 900
900
#273B7E
oklch(37.6% 0.116 267.9)
-
Step 950
950
#17234A
oklch(26.9% 0.074 268.3)
#2C459F 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) | #0052A2 | 0.038 |
| Deuteranopia (no green cones) | #00479D | 0.028 |
| Tritanopia (no blue cones) | #005B6B | 0.120 |
| Achromatopsia (no color) | #4C4C4C | 0.149 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2C459F
#2C459F
oklch(42.6% 0.149 267.8)
- #634B00
#634B00
oklch(42.6% 0.087 87.5)
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 #2C459F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.031
- Blueberry #464196 ΔE 0.037
- Sapphire #2138AB ΔE 0.040
- Dark Slate Blue #483D8B ΔE 0.051
- Dusk Blue #26538D ΔE 0.051
- Light Navy #155084 ΔE 0.059
- Blue Blue #2242C7 ΔE 0.065
- Twilight Blue #0A437A ΔE 0.069
Use #2C459F 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.