#21699D
Closest named color: Peacock Blue (#016795). oklch(50.3% 0.108 244.7), rgb(33, 105, 157).
Aa
White text reads best on this color (5.87:1).
About this color
#21699D is a medium-dark, moderately saturated blue. In OKLCH its lightness is 50%, its chroma 0.108 and its hue 245°. Its hue sits on the cool side of the wheel. The nearest named color is Peacock Blue (#016795), ΔE 0.020 away. White text reads best on it, at 5.87:1.
| Hue family | Blues |
| Lightness | medium-dark (50%) |
| Chroma | moderately saturated (0.108) |
| Temperature | cool |
| Nearest name | Peacock Blue (#016795) |
| Black text | 3.57:1 |
| White text | 5.87:1 |
Values
| HEX | #21699D |
| RGB | rgb(33, 105, 157) |
| HSL | hsl(205, 65%, 37%) |
| OKLCH | oklch(50.3% 0.108 244.7) |
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 #21699D | 5.87:1 | AA | Lc -84.3 | Fine for body text |
| Black text on #21699D | 3.57:1 | AA large text | Lc 25.0 | Dividers and decoration only |
| #21699D text on white | 5.87:1 | AA | Lc 79.0 | Fine for body text |
| #21699D text on black | 3.57:1 | AA large text | Lc -22.8 | 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF4
oklch(93.6% 0.016 248)
-
Step 200
200
#CADCEB
oklch(88.6% 0.028 243.1)
-
Step 300
300
#A5C5E1
oklch(80.9% 0.053 244.9)
-
Step 400
400
#73A6D2
oklch(70.6% 0.085 245.4)
-
Step 500
500
#4C90C6
oklch(63.2% 0.107 244.6)
-
Step 600
600
#2B79B2
oklch(55.6% 0.116 244.5)
-
Step 700
700 (this color)
#21699D
oklch(50.3% 0.108 244.7)
-
Step 800
800
#1B537C
oklch(42.7% 0.089 244.6)
-
Step 900
900
#1D4564
oklch(37.7% 0.07 244.6)
-
Step 950
950
#12293B
oklch(27.2% 0.044 244.1)
#21699D 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) | #516B9F | 0.047 |
| Deuteranopia (no green cones) | #3F5F9C | 0.035 |
| Tritanopia (no blue cones) | #00767C | 0.076 |
| Achromatopsia (no color) | #646464 | 0.108 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #21699D
#21699D
oklch(50.3% 0.108 244.7)
- #8E550D
#8E550D
oklch(50.4% 0.108 64.6)
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 #21699D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Peacock Blue #016795 ΔE 0.020
- Ocean Blue #03719C ΔE 0.025
- Denim #3B638C ΔE 0.032
- Muted Blue #3B719F ΔE 0.034
- Mid Blue #276AB3 ΔE 0.036
- Sea Blue #047495 ΔE 0.039
- Dusky Blue #475F94 ΔE 0.041
- French Blue #436BAD ΔE 0.041
Use #21699D 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.