#2A45A2
Closest named color: Cobalt (#1E488F). oklch(42.8% 0.154 267.2), rgb(42, 69, 162).
Aa
White text reads best on this color (8.49:1).
About this color
#2A45A2 is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.154 and its hue 267°. Its hue sits on the cool side of the wheel. The nearest named color is Cobalt (#1E488F), ΔE 0.035 away. White text reads best on it, at 8.49:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.154) |
| Temperature | cool |
| Nearest name | Cobalt (#1E488F) |
| Black text | 2.47:1 |
| White text | 8.49:1 |
Values
| HEX | #2A45A2 |
| RGB | rgb(42, 69, 162) |
| HSL | hsl(227, 59%, 40%) |
| OKLCH | oklch(42.8% 0.154 267.2) |
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 #2A45A2 | 8.49:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #2A45A2 | 2.47:1 | Fails | Lc 15.2 | Dividers and decoration only |
| #2A45A2 text on white | 8.49:1 | AAA | Lc 88.8 | Fine for body text |
| #2A45A2 text on black | 2.47:1 | Fails | Lc -13.4 | 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
#E2EAFC
oklch(93.6% 0.026 266.6)
-
Step 200
200
#CAD9FB
oklch(88.5% 0.05 266.5)
-
Step 300
300
#A7BFFC
oklch(80.9% 0.091 267.7)
-
Step 400
400
#799CFA
oklch(70.8% 0.143 267.3)
-
Step 500
500
#5880F7
oklch(63.2% 0.183 267.1)
-
Step 600
600
#4065E6
oklch(55.5% 0.2 267.3)
-
Step 700
700
#3253C8
oklch(49.1% 0.186 267.1)
-
Step 800
800 (this color)
#2A45A2
oklch(42.8% 0.154 267.2)
-
Step 900
900
#253B80
oklch(37.6% 0.12 267.1)
-
Step 950
950
#16234B
oklch(26.9% 0.076 267.6)
#2A45A2 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) | #0052A5 | 0.037 |
| Deuteranopia (no green cones) | #0047A0 | 0.026 |
| Tritanopia (no blue cones) | #005C6C | 0.123 |
| Achromatopsia (no color) | #4D4D4D | 0.154 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2A45A2
#2A45A2
oklch(42.8% 0.154 267.2)
- #644B00
#644B00
oklch(42.8% 0.087 86.6)
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 #2A45A2, closest first.
No curated palette has a color within ΔE 0.04 of #2A45A2.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cobalt #1E488F ΔE 0.035
- Sapphire #2138AB ΔE 0.037
- Blueberry #464196 ΔE 0.041
- Dusk Blue #26538D ΔE 0.054
- Dark Slate Blue #483D8B ΔE 0.055
- Blue Blue #2242C7 ΔE 0.060
- Light Navy #155084 ΔE 0.063
- Majorelle Blue #3F37C9 ΔE 0.071
Use #2A45A2 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.