#6183BF
Closest named color: Cool Blue (#4984B8). oklch(61% 0.1 261.3), rgb(97, 131, 191).
Aa
Black text reads best on this color (5.50:1).
About this color
#6183BF is a medium-dark, moderately saturated blue. In OKLCH its lightness is 61%, its chroma 0.100 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.029 away. Black text reads best on it, at 5.50:1.
| Hue family | Blues |
| Lightness | medium-dark (61%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.50:1 |
| White text | 3.81:1 |
Values
| HEX | #6183BF |
| RGB | rgb(97, 131, 191) |
| HSL | hsl(218, 42%, 56%) |
| OKLCH | oklch(61% 0.1 261.3) |
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 #6183BF | 3.81:1 | AA large text | Lc -71.0 | Content text, not long reading |
| Black text on #6183BF | 5.50:1 | AA | Lc 38.5 | Non-text elements, placeholder text |
| #6183BF text on white | 3.81:1 | AA large text | Lc 65.5 | Content text, not long reading |
| #6183BF text on black | 5.50:1 | AA | Lc -36.1 | 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 500.
-
Step 50
50
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E5EAF4
oklch(93.6% 0.015 264.5)
-
Step 200
200
#CFDAEC
oklch(88.5% 0.028 260.3)
-
Step 300
300
#AFC2E1
oklch(81% 0.049 260.2)
-
Step 400
400
#85A1D2
oklch(70.6% 0.079 261.4)
-
Step 500
500 (this color)
#6183BF
oklch(61% 0.1 261.3)
-
Step 600
600
#4F72B2
oklch(55.5% 0.108 261.7)
-
Step 700
700
#3F609A
oklch(49.2% 0.101 261)
-
Step 800
800
#344E7C
oklch(42.6% 0.083 261.2)
-
Step 900
900
#2E4164
oklch(37.6% 0.065 262)
-
Step 950
950
#1B263B
oklch(26.9% 0.042 262.7)
#6183BF 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) | #6C87C2 | 0.019 |
| Deuteranopia (no green cones) | #617FBE | 0.011 |
| Tritanopia (no blue cones) | #389098 | 0.090 |
| Achromatopsia (no color) | #838383 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #6183BF
#6183BF
oklch(61% 0.1 261.3)
- #A17C35
#A17C35
oklch(60.8% 0.099 81.1)
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 #6183BF, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.029
- Faded Blue #658CBB ΔE 0.029
- Off Blue #5684AE ΔE 0.031
- Dusty Blue #5A86AD ΔE 0.033
- Steel Blue #4682B4 ΔE 0.035
- Windows Blue #3778BF ΔE 0.056
- Water Blue #0E87CC ΔE 0.057
- Silver Lake Blue #778DA9 ΔE 0.057
Use #6183BF 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.