#2545AA
Closest named color: Sapphire (#2138AB). oklch(43.2% 0.166 266.1), rgb(37, 69, 170).
Aa
White text reads best on this color (8.36:1).
About this color
#2545AA is a dark, vivid blue. In OKLCH its lightness is 43%, its chroma 0.166 and its hue 266°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.031 away. White text reads best on it, at 8.36:1.
| Hue family | Blues |
| Lightness | dark (43%) |
| Chroma | vivid (0.166) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.51:1 |
| White text | 8.36:1 |
Values
| HEX | #2545AA |
| RGB | rgb(37, 69, 170) |
| HSL | hsl(226, 64%, 41%) |
| OKLCH | oklch(43.2% 0.166 266.1) |
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 #2545AA | 8.36:1 | AAA | Lc -92.9 | Preferred for body text |
| Black text on #2545AA | 2.51:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #2545AA text on white | 8.36:1 | AAA | Lc 88.3 | Fine for body text |
| #2545AA text on black | 2.51:1 | Fails | Lc -13.9 | 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
#F1F5FF
oklch(97% 0.014 268.5)
-
Step 100
100
#E1EAFD
oklch(93.6% 0.028 265.4)
-
Step 200
200
#C8D9FE
oklch(88.5% 0.054 265.8)
-
Step 300
300
#A4C0FF
oklch(81% 0.095 265.8)
-
Step 400
400
#749CFF
oklch(70.8% 0.152 266)
-
Step 500
500
#517FFF
oklch(63.2% 0.197 266)
-
Step 600
600
#3763EF
oklch(55.5% 0.216 266)
-
Step 700
700
#2B51D0
oklch(49.1% 0.201 266.1)
-
Step 800
800 (this color)
#2545AA
oklch(43.2% 0.166 266.1)
-
Step 900
900
#213A85
oklch(37.6% 0.13 266.3)
-
Step 950
950
#13234E
oklch(27% 0.082 265.8)
#2545AA 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) | #0054AD | 0.039 |
| Deuteranopia (no green cones) | #0048A8 | 0.021 |
| Tritanopia (no blue cones) | #005F70 | 0.132 |
| Achromatopsia (no color) | #4E4E4E | 0.167 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2545AA
#2545AA
oklch(43.2% 0.166 266.1)
- #664C00
#664C00
oklch(43.2% 0.089 85.9)
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 #2545AA, closest first.
No curated palette has a color within ΔE 0.04 of #2545AA.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.031
- Cobalt #1E488F ΔE 0.046
- Blue Blue #2242C7 ΔE 0.047
- Blueberry #464196 ΔE 0.052
- Majorelle Blue #3F37C9 ΔE 0.062
- Dusk Blue #26538D ΔE 0.064
- Dark Slate Blue #483D8B ΔE 0.067
- Light Navy #155084 ΔE 0.073
Use #2545AA 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.