#6374B2
Closest named color: Steel Blue (#4682B4). oklch(57.2% 0.098 271.4), rgb(99, 116, 178).
Aa
Black text reads best on this color (4.67:1).
About this color
#6374B2 is a medium-dark, moderately saturated blue. In OKLCH its lightness is 57%, its chroma 0.098 and its hue 271°. Its hue sits on the cool side of the wheel. The nearest named color is Steel Blue (#4682B4), ΔE 0.047 away. Black text reads best on it, at 4.67:1.
| Hue family | Blues |
| Lightness | medium-dark (57%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | Steel Blue (#4682B4) |
| Black text | 4.67:1 |
| White text | 4.49:1 |
Values
| HEX | #6374B2 |
| RGB | rgb(99, 116, 178) |
| HSL | hsl(227, 34%, 54%) |
| OKLCH | oklch(57.2% 0.098 271.4) |
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 #6374B2 | 4.49:1 | AA large text | Lc -76.6 | Fine for body text |
| Black text on #6374B2 | 4.67:1 | AA | Lc 33.0 | Non-text elements, placeholder text |
| #6374B2 text on white | 4.49:1 | AA large text | Lc 71.1 | Content text, not long reading |
| #6374B2 text on black | 4.67:1 | AA | Lc -30.5 | 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
#F4F5FA
oklch(97.1% 0.007 277.2)
-
Step 100
100
#E7EAF3
oklch(93.7% 0.013 271.3)
-
Step 200
200
#D3D9EA
oklch(88.6% 0.024 270.3)
-
Step 300
300
#B6C0DE
oklch(81% 0.044 270.8)
-
Step 400
400
#909FCD
oklch(70.7% 0.07 270.5)
-
Step 500
500
#7686C1
oklch(63.1% 0.091 272)
-
Step 600
600 (this color)
#6374B2
oklch(57.2% 0.098 271.4)
-
Step 700
700
#4E5D94
oklch(49.1% 0.09 271.2)
-
Step 800
800
#404C78
oklch(42.7% 0.075 271.4)
-
Step 900
900
#364061
oklch(37.8% 0.058 270.6)
-
Step 950
950
#202539
oklch(26.9% 0.038 272.9)
#6374B2 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) | #5E7AB5 | 0.017 |
| Deuteranopia (no green cones) | #5774B1 | 0.015 |
| Tritanopia (no blue cones) | #47818B | 0.088 |
| Achromatopsia (no color) | #777777 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6374B2
#6374B2
oklch(57.2% 0.098 271.4)
- #8D752A
#8D752A
oklch(57.1% 0.097 91)
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 #6374B2, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Steel Blue #4682B4 ΔE 0.047
- Windows Blue #3778BF ΔE 0.048
- Off Blue #5684AE ΔE 0.048
- Flat Blue #3C73A8 ΔE 0.048
- Cool Blue #4984B8 ΔE 0.048
- Dull Blue #49759C ΔE 0.049
- French Blue #436BAD ΔE 0.050
- Stormy Blue #507B9C ΔE 0.050
Use #6374B2 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.