#0C45A9
Closest named color: Sapphire (#2138AB). oklch(42.4% 0.17 261.2), rgb(12, 69, 169).
Aa
White text reads best on this color (8.60:1).
About this color
#0C45A9 is a dark, vivid blue. In OKLCH its lightness is 42%, its chroma 0.170 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Sapphire (#2138AB), ΔE 0.030 away. White text reads best on it, at 8.60:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | vivid (0.170) |
| Temperature | cool |
| Nearest name | Sapphire (#2138AB) |
| Black text | 2.43:1 |
| White text | 8.60:1 |
Values
| HEX | #0C45A9 |
| RGB | rgb(12, 69, 169) |
| HSL | hsl(218, 87%, 35%) |
| OKLCH | oklch(42.4% 0.17 261.2) |
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 #0C45A9 | 8.60:1 | AAA | Lc -93.4 | Preferred for body text |
| Black text on #0C45A9 | 2.43:1 | Fails | Lc 15.2 | Dividers and decoration only |
| #0C45A9 text on white | 8.60:1 | AAA | Lc 88.8 | Fine for body text |
| #0C45A9 text on black | 2.43:1 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEBFE
oklch(93.7% 0.029 259.6)
-
Step 200
200
#C5DAFF
oklch(88.5% 0.056 261.8)
-
Step 300
300
#9EC1FF
oklch(80.8% 0.096 261.6)
-
Step 400
400
#699FFF
oklch(70.8% 0.152 261.1)
-
Step 500
500
#3E82FF
oklch(63% 0.199 261.3)
-
Step 600
600
#1867F1
oklch(55.6% 0.22 261.1)
-
Step 700
700
#0954D2
oklch(49% 0.205 261.2)
-
Step 800
800 (this color)
#0C45A9
oklch(42.4% 0.17 261.2)
-
Step 900
900
#133C86
oklch(37.6% 0.132 261.1)
-
Step 950
950
#0D244F
oklch(27% 0.084 261.5)
#0C45A9 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) | #0053AC | 0.036 |
| Deuteranopia (no green cones) | #0045A7 | 0.006 |
| Tritanopia (no blue cones) | #005F70 | 0.130 |
| Achromatopsia (no color) | #4C4C4C | 0.170 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0C45A9
#0C45A9
oklch(42.4% 0.17 261.2)
- #664800
#664800
oklch(42.3% 0.087 81.3)
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 #0C45A9, closest first.
No curated palette has a color within ΔE 0.04 of #0C45A9.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Sapphire #2138AB ΔE 0.030
- Cobalt #1E488F ΔE 0.045
- Blue Blue #2242C7 ΔE 0.050
- Blueberry #464196 ΔE 0.065
- Dusk Blue #26538D ΔE 0.066
- Light Navy #155084 ΔE 0.071
- Majorelle Blue #3F37C9 ΔE 0.072
- Twilight Blue #0A437A ΔE 0.078
Use #0C45A9 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.