#5378B0
Closest named color: Steel Blue (#4682B4). oklch(57% 0.097 258.4), rgb(83, 120, 176).
Aa
Black text reads best on this color (4.68:1).
About this color
#5378B0 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.097 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Blue (#4682B4), ΔE 0.029 away. Black text reads best on it, at 4.68:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.097) |
| Temperature | cool |
| Nearest name | Steel Blue (#4682B4) |
| Black text | 4.68:1 |
| White text | 4.48:1 |
Values
| HEX | #5378B0 |
| RGB | rgb(83, 120, 176) |
| HSL | hsl(216, 37%, 51%) |
| OKLCH | oklch(57% 0.097 258.4) |
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 #5378B0 | 4.48:1 | AA large text | Lc -76.5 | Fine for body text |
| Black text on #5378B0 | 4.68:1 | AA | Lc 33.1 | Non-text elements, placeholder text |
| #5378B0 text on white | 4.48:1 | AA large text | Lc 71.0 | Content text, not long reading |
| #5378B0 text on black | 4.68:1 | AA | Lc -30.6 | Non-text elements, placeholder text |
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 600.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E5EAF2
oklch(93.6% 0.012 259.8)
-
Step 200
200
#D0DAEA
oklch(88.6% 0.025 259.8)
-
Step 300
300
#B0C2DD
oklch(80.9% 0.043 258.4)
-
Step 400
400
#86A2CC
oklch(70.6% 0.069 258.3)
-
Step 500
500
#688BBF
oklch(63.2% 0.088 258.1)
-
Step 600
600 (this color)
#5378B0
oklch(57% 0.097 258.4)
-
Step 700
700
#406193
oklch(49.1% 0.09 258.5)
-
Step 800
800
#354F78
oklch(42.6% 0.076 259.2)
-
Step 900
900
#2E4260
oklch(37.6% 0.058 258.3)
-
Step 950
950
#1B2738
oklch(27% 0.036 257.1)
#5378B0 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) | #627CB2 | 0.023 |
| Deuteranopia (no green cones) | #5773AF | 0.014 |
| Tritanopia (no blue cones) | #23848C | 0.086 |
| Achromatopsia (no color) | #777777 | 0.097 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5378B0
#5378B0
oklch(57% 0.097 258.4)
- #96702C
#96702C
oklch(57% 0.097 79)
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 #5378B0, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Blue #4682B4 ΔE 0.029
- Flat Blue #3C73A8 ΔE 0.032
- Cool Blue #4984B8 ΔE 0.033
- Windows Blue #3778BF ΔE 0.034
- Dull Blue #49759C ΔE 0.034
- Stormy Blue #507B9C ΔE 0.035
- Off Blue #5684AE ΔE 0.036
- Cerulean #457B9D ΔE 0.037
Use #5378B0 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.