#045AAA
Closest named color: Dusk Blue (#26538D). oklch(47% 0.147 253.9), rgb(4, 90, 170).
Aa
White text reads best on this color (6.88:1).
About this color
#045AAA is a medium-dark, vivid blue. In OKLCH its lightness is 47%, its chroma 0.147 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Dusk Blue (#26538D), ΔE 0.049 away. White text reads best on it, at 6.88:1.
| Hue family | Blues |
| Lightness | medium-dark (47%) |
| Chroma | vivid (0.147) |
| Temperature | cool |
| Nearest name | Dusk Blue (#26538D) |
| Black text | 3.04:1 |
| White text | 6.88:1 |
Values
| HEX | #045AAA |
| RGB | rgb(4, 90, 170) |
| HSL | hsl(209, 95%, 34%) |
| OKLCH | oklch(47% 0.147 253.9) |
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 #045AAA | 6.88:1 | AA | Lc -88.2 | Fine for body text |
| Black text on #045AAA | 3.04:1 | AA large text | Lc 20.9 | Dividers and decoration only |
| #045AAA text on white | 6.88:1 | AA | Lc 83.1 | Fine for body text |
| #045AAA text on black | 3.04:1 | AA large text | Lc -18.8 | Dividers and decoration only |
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 700.
-
Step 50
50
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF3
oklch(88.5% 0.039 254.3)
-
Step 300
300
#A1C4EE
oklch(80.9% 0.071 253.2)
-
Step 400
400
#6DA4E6
oklch(70.8% 0.113 253.7)
-
Step 500
500
#438BDF
oklch(63.1% 0.146 254)
-
Step 600
600
#1F73CC
oklch(55.5% 0.158 253.9)
-
Step 700
700 (this color)
#045AAA
oklch(47% 0.147 253.9)
-
Step 800
800
#124F8F
oklch(42.7% 0.121 253.8)
-
Step 900
900
#184272
oklch(37.7% 0.095 254)
-
Step 950
950
#0F2743
oklch(27% 0.06 253.9)
#045AAA 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) | #2C61AD | 0.032 |
| Deuteranopia (no green cones) | #0054A8 | 0.017 |
| Tritanopia (no blue cones) | #006D79 | 0.108 |
| Achromatopsia (no color) | #5A5A5A | 0.147 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #045AAA
#045AAA
oklch(47% 0.147 253.9)
- #7C5100
#7C5100
oklch(47.1% 0.1 73.9)
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 #045AAA, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dusk Blue #26538D ΔE 0.049
- Denim Blue #3B5B92 ΔE 0.052
- Mid Blue #276AB3 ΔE 0.052
- Peacock Blue #016795 ΔE 0.055
- Light Navy Blue #2E5A88 ΔE 0.058
- Cobalt #1E488F ΔE 0.062
- Dusky Blue #475F94 ΔE 0.064
- Light Navy #155084 ΔE 0.064
Use #045AAA 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.