#18648B
Closest named color: Peacock Blue (#016795). oklch(47.8% 0.094 236.8), rgb(24, 100, 139).
Aa
White text reads best on this color (6.49:1).
About this color
#18648B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.094 and its hue 237°. Its hue sits on the cool side of the wheel. The nearest named color is Peacock Blue (#016795), ΔE 0.017 away. White text reads best on it, at 6.49:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.094) |
| Temperature | cool |
| Nearest name | Peacock Blue (#016795) |
| Black text | 3.23:1 |
| White text | 6.49:1 |
Values
| HEX | #18648B |
| RGB | rgb(24, 100, 139) |
| HSL | hsl(200, 71%, 32%) |
| OKLCH | oklch(47.8% 0.094 236.8) |
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 #18648B | 6.49:1 | AA | Lc -86.9 | Fine for body text |
| Black text on #18648B | 3.23:1 | AA large text | Lc 22.2 | Dividers and decoration only |
| #18648B text on white | 6.49:1 | AA | Lc 81.8 | Fine for body text |
| #18648B text on black | 3.23:1 | AA large text | Lc -20.1 | Dividers and decoration only |
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 700.
-
Step 50
50
#F2F6F9
oklch(97.1% 0.006 239.8)
-
Step 100
100
#E2EBF2
oklch(93.5% 0.014 241)
-
Step 200
200
#CADCE8
oklch(88.5% 0.025 236.9)
-
Step 300
300
#A6C6DB
oklch(81% 0.045 236.9)
-
Step 400
400
#74A8C9
oklch(70.7% 0.073 237)
-
Step 500
500
#4D92BB
oklch(63.2% 0.093 236.9)
-
Step 600
600
#2C7BA7
oklch(55.5% 0.102 237.3)
-
Step 700
700 (this color)
#18648B
oklch(47.8% 0.094 236.8)
-
Step 800
800
#1B5574
oklch(42.7% 0.078 236.4)
-
Step 900
900
#1D465E
oklch(37.6% 0.061 237.2)
-
Step 950
950
#122937
oklch(26.9% 0.039 237.4)
#18648B 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) | #51648D | 0.054 |
| Deuteranopia (no green cones) | #42598A | 0.044 |
| Tritanopia (no blue cones) | #006E71 | 0.061 |
| Achromatopsia (no color) | #5E5E5E | 0.094 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #18648B
#18648B
oklch(47.8% 0.094 236.8)
- #844E21
#844E21
oklch(47.8% 0.094 57.4)
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 #18648B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Peacock Blue #016795 ΔE 0.017
- Denim #3B638C ΔE 0.027
- Light Navy Blue #2E5A88 ΔE 0.031
- Denim Blue #3B5B92 ΔE 0.040
- Ocean Blue #03719C ΔE 0.042
- YInMn Blue #415A77 ΔE 0.046
- Dusky Blue #475F94 ΔE 0.047
- Sea Blue #047495 ΔE 0.047
Use #18648B 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.