#045CBE
Closest named color: Mid Blue (#276AB3). oklch(49% 0.171 256.9), rgb(4, 92, 190).
Aa
White text reads best on this color (6.40:1).
About this color
#045CBE is a medium-dark, vivid blue. In OKLCH its lightness is 49%, its chroma 0.171 and its hue 257°. Its hue sits on the cool side of the wheel. The nearest named color is Mid Blue (#276AB3), ΔE 0.049 away. White text reads best on it, at 6.40:1.
| Hue family | Blues |
| Lightness | medium-dark (49%) |
| Chroma | vivid (0.171) |
| Temperature | cool |
| Nearest name | Mid Blue (#276AB3) |
| Black text | 3.27:1 |
| White text | 6.40:1 |
Values
| HEX | #045CBE |
| RGB | rgb(4, 92, 190) |
| HSL | hsl(212, 96%, 38%) |
| OKLCH | oklch(49% 0.171 256.9) |
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 #045CBE | 6.40:1 | AA | Lc -86.2 | Fine for body text |
| Black text on #045CBE | 3.27:1 | AA large text | Lc 23.0 | Dividers and decoration only |
| #045CBE text on white | 6.40:1 | AA | Lc 81.0 | Fine for body text |
| #045CBE text on black | 3.27:1 | AA large text | Lc -20.8 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBFA
oklch(93.6% 0.024 256.1)
-
Step 200
200
#C6DBF8
oklch(88.5% 0.046 256.5)
-
Step 300
300
#9FC3F6
oklch(80.9% 0.082 257.1)
-
Step 400
400
#69A2F2
oklch(70.7% 0.132 257)
-
Step 500
500
#3D88ED
oklch(63.1% 0.169 256.9)
-
Step 600
600
#166FDB
oklch(55.5% 0.183 256.9)
-
Step 700
700 (this color)
#045CBE
oklch(49% 0.171 256.9)
-
Step 800
800
#0C4C9A
oklch(42.7% 0.141 256.9)
-
Step 900
900
#14407A
oklch(37.6% 0.11 256.9)
-
Step 950
950
#0D2648
oklch(27% 0.07 257)
#045CBE 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) | #1567C2 | 0.031 |
| Deuteranopia (no green cones) | #0058BC | 0.011 |
| Tritanopia (no blue cones) | #007484 | 0.128 |
| Achromatopsia (no color) | #5F5F5F | 0.171 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #045CBE
#045CBE
oklch(49% 0.171 256.9)
- #815700
#815700
oklch(49% 0.103 76.4)
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 #045CBE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Mid Blue #276AB3 ΔE 0.049
- Blue Blue #2242C7 ΔE 0.062
- French Blue #436BAD ΔE 0.070
- Warm Blue #4B57DB ΔE 0.071
- Azul #1D5DEC ΔE 0.073
- Denim Blue #3B5B92 ΔE 0.076
- Peacock Blue #016795 ΔE 0.077
- Royal Blue #4169E1 ΔE 0.078
Use #045CBE 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.