#12639B
Closest named color: Peacock Blue (#016795). oklch(48.3% 0.115 245.6), rgb(18, 99, 155).
Aa
White text reads best on this color (6.39:1).
About this color
#12639B is a medium-dark, moderately saturated blue. In OKLCH its lightness is 48%, its chroma 0.115 and its hue 246°. 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 6.39:1.
| Hue family | Blues |
| Lightness | medium-dark (48%) |
| Chroma | moderately saturated (0.115) |
| Temperature | cool |
| Nearest name | Peacock Blue (#016795) |
| Black text | 3.28:1 |
| White text | 6.39:1 |
Values
| HEX | #12639B |
| RGB | rgb(18, 99, 155) |
| HSL | hsl(205, 79%, 34%) |
| OKLCH | oklch(48.3% 0.115 245.6) |
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 #12639B | 6.39:1 | AA | Lc -86.4 | Fine for body text |
| Black text on #12639B | 3.28:1 | AA large text | Lc 22.7 | Dividers and decoration only |
| #12639B text on white | 6.39:1 | AA | Lc 81.3 | Fine for body text |
| #12639B text on black | 3.28:1 | AA large text | Lc -20.6 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E1EBF4
oklch(93.5% 0.016 245.1)
-
Step 200
200
#C9DCED
oklch(88.6% 0.031 245.1)
-
Step 300
300
#A3C5E3
oklch(80.9% 0.056 245.2)
-
Step 400
400
#70A6D5
oklch(70.6% 0.09 245.8)
-
Step 500
500
#488FCA
oklch(63% 0.114 246.1)
-
Step 600
600
#2579B7
oklch(55.7% 0.124 245.5)
-
Step 700
700 (this color)
#12639B
oklch(48.3% 0.115 245.6)
-
Step 800
800
#165380
oklch(42.8% 0.096 245.6)
-
Step 900
900
#1A4566
oklch(37.7% 0.074 244.9)
-
Step 950
950
#11283C
oklch(26.9% 0.047 246.9)
#12639B 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) | #48659D | 0.045 |
| Deuteranopia (no green cones) | #345A9A | 0.031 |
| Tritanopia (no blue cones) | #007177 | 0.082 |
| Achromatopsia (no color) | #5F5F5F | 0.115 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #12639B
#12639B
oklch(48.3% 0.115 245.6)
- #875000
#875000
oklch(48.4% 0.108 65.9)
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 #12639B, 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 Blue #3B5B92 ΔE 0.035
- Denim #3B638C ΔE 0.036
- Light Navy Blue #2E5A88 ΔE 0.037
- Ocean Blue #03719C ΔE 0.041
- Dusky Blue #475F94 ΔE 0.043
- Mid Blue #276AB3 ΔE 0.044
- Dusk Blue #26538D ΔE 0.047
Use #12639B 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.