#5183BE
Closest named color: Cool Blue (#4984B8). oklch(60.1% 0.106 253.5), rgb(81, 131, 190).
Aa
Black text reads best on this color (5.33:1).
About this color
#5183BE is a medium-dark, moderately saturated blue. In OKLCH its lightness is 60%, its chroma 0.106 and its hue 254°. Its hue sits on the cool side of the wheel. The nearest named color is Cool Blue (#4984B8), ΔE 0.013 away. Black text reads best on it, at 5.33:1.
| Hue family | Blues |
| Lightness | medium-dark (60%) |
| Chroma | moderately saturated (0.106) |
| Temperature | cool |
| Nearest name | Cool Blue (#4984B8) |
| Black text | 5.33:1 |
| White text | 3.93:1 |
Values
| HEX | #5183BE |
| RGB | rgb(81, 131, 190) |
| HSL | hsl(212, 46%, 53%) |
| OKLCH | oklch(60.1% 0.106 253.5) |
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 #5183BE | 3.93:1 | AA large text | Lc -72.1 | Content text, not long reading |
| Black text on #5183BE | 5.33:1 | AA | Lc 37.5 | Non-text elements, placeholder text |
| #5183BE text on white | 3.93:1 | AA large text | Lc 66.6 | Content text, not long reading |
| #5183BE text on black | 5.33:1 | AA | Lc -35.1 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E3EBF4
oklch(93.7% 0.015 251.2)
-
Step 200
200
#CCDBEC
oklch(88.5% 0.029 251.5)
-
Step 300
300
#AAC3E2
oklch(80.9% 0.052 253.9)
-
Step 400
400
#7CA4D3
oklch(70.7% 0.082 252.9)
-
Step 500
500 (this color)
#5183BE
oklch(60.1% 0.106 253.5)
-
Step 600
600
#3F75B5
oklch(55.5% 0.116 254)
-
Step 700
700
#31629B
oklch(49% 0.106 253.7)
-
Step 800
800
#29507E
oklch(42.6% 0.089 253.9)
-
Step 900
900
#264365
oklch(37.7% 0.068 253.4)
-
Step 950
950
#17273B
oklch(26.9% 0.043 254.6)
#5183BE 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) | #6B86C1 | 0.032 |
| Deuteranopia (no green cones) | #5C7CBD | 0.021 |
| Tritanopia (no blue cones) | #009098 | 0.091 |
| Achromatopsia (no color) | #808080 | 0.106 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #5183BE
#5183BE
oklch(60.1% 0.106 253.5)
- #A6762E
#A6762E
oklch(60.1% 0.106 74)
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 #5183BE, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Cool Blue #4984B8 ΔE 0.013
- Steel Blue #4682B4 ΔE 0.020
- Off Blue #5684AE ΔE 0.026
- Dusty Blue #5A86AD ΔE 0.031
- Faded Blue #658CBB ΔE 0.037
- Water Blue #0E87CC ΔE 0.042
- Windows Blue #3778BF ΔE 0.043
- Blue NCS #118AB2 ΔE 0.049
Use #5183BE 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.