#42689F
Closest named color: French Blue (#436BAD). oklch(51.5% 0.098 257.6), rgb(66, 104, 159).
Aa
White text reads best on this color (5.65:1).
About this color
#42689F is a medium-dark, moderately saturated blue. In OKLCH its lightness is 51%, its chroma 0.098 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is French Blue (#436BAD), ΔE 0.023 away. White text reads best on it, at 5.65:1.
| Hue family | Blues |
| Lightness | medium-dark (51%) |
| Chroma | moderately saturated (0.098) |
| Temperature | cool |
| Nearest name | French Blue (#436BAD) |
| Black text | 3.71:1 |
| White text | 5.65:1 |
Values
| HEX | #42689F |
| RGB | rgb(66, 104, 159) |
| HSL | hsl(215, 41%, 44%) |
| OKLCH | oklch(51.5% 0.098 257.6) |
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 #42689F | 5.65:1 | AA | Lc -83.4 | Fine for body text |
| Black text on #42689F | 3.71:1 | AA large text | Lc 25.9 | Dividers and decoration only |
| #42689F text on white | 5.65:1 | AA | Lc 78.1 | Fine for body text |
| #42689F text on black | 3.71:1 | AA large text | Lc -23.6 | 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
#F3F6FA
oklch(97.2% 0.006 255.5)
-
Step 100
100
#E4EAF3
oklch(93.5% 0.014 258.3)
-
Step 200
200
#CFDAEB
oklch(88.5% 0.026 259)
-
Step 300
300
#AEC2E0
oklch(80.9% 0.048 258.4)
-
Step 400
400
#83A2D0
oklch(70.6% 0.076 258.1)
-
Step 500
500
#648BC4
oklch(63.2% 0.097 257.8)
-
Step 600
600
#4A74B0
oklch(55.6% 0.105 257.4)
-
Step 700
700 (this color)
#42689F
oklch(51.5% 0.098 257.6)
-
Step 800
800
#314F7B
oklch(42.6% 0.082 257.9)
-
Step 900
900
#2C4263
oklch(37.7% 0.063 258.3)
-
Step 950
950
#1A273A
oklch(27% 0.04 257.8)
#42689F 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) | #516CA1 | 0.022 |
| Deuteranopia (no green cones) | #45639E | 0.014 |
| Tritanopia (no blue cones) | #00747C | 0.085 |
| Achromatopsia (no color) | #676767 | 0.098 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #42689F
#42689F
oklch(51.5% 0.098 257.6)
- #865F17
#865F17
oklch(51.4% 0.098 77.6)
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 #42689F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- French Blue #436BAD ΔE 0.023
- Muted Blue #3B719F ΔE 0.026
- Dusky Blue #475F94 ΔE 0.028
- Flat Blue #3C73A8 ΔE 0.031
- Denim #3B638C ΔE 0.033
- Mid Blue #276AB3 ΔE 0.037
- Dull Blue #49759C ΔE 0.042
- Denim Blue #3B5B92 ΔE 0.042
Use #42689F 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.