#045374
Closest named color: Deep Sea Blue (#015482). oklch(41.7% 0.086 234.4), rgb(4, 83, 116).
Aa
White text reads best on this color (8.41:1).
About this color
#045374 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.086 and its hue 234°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.023 away. White text reads best on it, at 8.41:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.086) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.49:1 |
| White text | 8.41:1 |
Values
| HEX | #045374 |
| RGB | rgb(4, 83, 116) |
| HSL | hsl(198, 93%, 24%) |
| OKLCH | oklch(41.7% 0.086 234.4) |
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 #045374 | 8.41:1 | AAA | Lc -93.1 | Preferred for body text |
| Black text on #045374 | 2.49:1 | Fails | Lc 15.5 | Dividers and decoration only |
| #045374 text on white | 8.41:1 | AAA | Lc 88.5 | Fine for body text |
| #045374 text on black | 2.49:1 | Fails | Lc -13.7 | 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
#F1F6F9
oklch(97% 0.007 233.6)
-
Step 100
100
#E1ECF2
oklch(93.7% 0.014 231.2)
-
Step 200
200
#C8DDE9
oklch(88.6% 0.028 232.7)
-
Step 300
300
#A2C7DD
oklch(81% 0.05 234.3)
-
Step 400
400
#6CA9CC
oklch(70.7% 0.081 234.8)
-
Step 500
500
#4093BE
oklch(63% 0.103 234.4)
-
Step 600
600
#137DAB
oklch(55.7% 0.112 234.4)
-
Step 700
700
#006992
oklch(49.1% 0.103 234.3)
-
Step 800
800 (this color)
#045374
oklch(41.7% 0.086 234.4)
-
Step 900
900
#154760
oklch(37.7% 0.067 234.6)
-
Step 950
950
#0E2A38
oklch(27.1% 0.042 233.2)
#045374 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) | #435376 | 0.053 |
| Deuteranopia (no green cones) | #354973 | 0.043 |
| Tritanopia (no blue cones) | #005C5E | 0.054 |
| Achromatopsia (no color) | #4D4D4D | 0.086 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #045374
#045374
oklch(41.7% 0.086 234.4)
- #703E18
#703E18
oklch(41.8% 0.086 54.5)
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 #045374, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.023
- Light Navy #155084 ΔE 0.032
- Petrol #005F6A ΔE 0.046
- Deep Teal #00555A ΔE 0.047
- Dusk Blue #26538D ΔE 0.048
- Light Navy Blue #2E5A88 ΔE 0.049
- Dark Grey Blue #29465B ΔE 0.052
- Twilight Blue #0A437A ΔE 0.053
Use #045374 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.